PDF malware analysis — malicious · 8fec9f84d0cd591c

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 07:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 72899946d9ef34fd771046e2f55d0598 SHA-1: 8334022a42c65677d03c85f83a9b8d44f35b60c2 SHA-256: 8fec9f84d0cd591cff3f305fc0d649daba496e6bc974f39fc158ce106bdfe886

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials

The file was detected as malicious by ClamAV and an ML classifier, specifically identified as a phishing lure impersonating Microsoft. The PDF contains numerous links, many hosted on compromised WordPress sites, designed to direct users to credential harvesting pages. No scripts were extracted, but the primary attack pattern is clear from the heuristics and embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=integration+of+cot+inverse+x+dx.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/moftq7ho2e5c2c9h69rkgjimj4/14207195906.pdf In PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/c0dc757994b4e33a9ca117af4d5786f0/fofoteduganexamimuvo.pdfIn PDF document text
- https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/77fcbe5d3fa160b417d963c71ff9143e/6157395459.pdfIn PDF document text
- http://arcdesantmarti.com/biocop/Images/images-editor/file/zakobenufebonofasebezavod.pdfIn PDF document text
- http://lctrading-gmbh.com/ckfinder/userfiles/files/1649150641.pdfIn PDF document text
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/4556f5318cc94c19d4e0414870bbccf2/59550452810.pdfIn PDF document text
- http://duoctruongxuan.vn/userfiles/image/file/98428555019.pdfIn PDF document text
- https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/510fa624d83df3440acd1c833641a3df/kawufotolunesewapoge.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085fd5b79698---21530971601.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e44ef80596---42290392364.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8mni4nu5750qkupp51i1utces4/28852699353.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608783f76c9ee---7816451964.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096f0045d51c---tujawameroterafimovakuto.pdfIn PDF document text
- http://dh-life.com/ckfinder/userfiles/files/82888856149.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cc9de83b7---27962371300.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/l5sf1c3dino20b8fsu8hlkb2r3/luzuvexewavobivewap.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/0de8f5f8e148f5d92641dd527324c599/fotugabeb.pdfIn PDF document text
- http://webinaris.org/ckfinder/userfiles/publics/files/37670430793.pdfIn PDF document text
- https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/99b01ce9154eca382ae160a8be619b9c/91981552417.pdfIn PDF document text
- http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/sujemaforutuvimezarumo.pdfIn PDF document text
- http://shuswapladystriders.ca/userfiles/file/xobeduvewexekugugisomal.pdfIn PDF document text
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/m7a6f0t6cu9ncabuno46rjt8pt/15560998122.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607cca2b03c1a---komosuvusemovogi.pdfIn PDF document text
- http://pincailight.com/zk/UploadFile/file/2021062415375873499.pdfIn PDF document text
- http://sashtraayurveda.com/ckfinder/userfiles/files/70699100354.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=integration+of+cot+inverse+x+dxPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d0a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0A0	10724 bytes
SHA-256: `351c37a5aecb8f47ef3ca43748a0304c7d575b75cdfd442fa03669442ca35fcc`
`font_01_sfnt_off0000e938.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE938	18420 bytes
SHA-256: `80ed00c9ef3c34258481c4dbb999d868a55762e8151ee659cd063e6f93a80077`
`font_02_sfnt_off00011a0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A0D	16088 bytes
SHA-256: `450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c`
`font_03_sfnt_off00012f42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F42	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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