PDF malware analysis — malicious · f0822be3245042d0

MALICIOUS

PDF

85.0 KB Created: 2021-09-04 01:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: c8820111e41b3cc834efbe14b48dcf38 SHA-1: f6a155a35e0146fb428e761d845052dc287c2043 SHA-256: f0822be3245042d0a603e0b40fc5244b2363e381cd714b255f38e909923576ab

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://drafthe.ru/uplcv?utm_term=zimbabwe+affidavit+form+pdf+download PDF link annotation
- http://aylincinarli.com/fckfiles/file/muwosenobesiwazuwoxulo.pdfIn PDF document text
- http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/42854682341.pdfIn PDF document text
- https://tsafar.ir/basefile/tsafarir/files/63204584099.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c29039ac99a---nilimakafik.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160910286771d5---67703904537.pdfIn PDF document text
- http://www.siposferenc.hu/html/tirusotatiwalejad.pdfIn PDF document text
- http://al-farh-iq.com/upload/userfiles/file/witodokawelofisuvezatilu.pdfIn PDF document text
- http://tutaylamhet.com/storage/ckfinder/files/tuselulugujobukewusejeda.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d09a24a4b0---wizijefuj.pdfIn PDF document text
- https://majubesar.info/contents//files/1193050698.pdfIn PDF document text
- http://www.malagatour.es/ckfinder/userfiles/files/51329118726.pdfIn PDF document text
- http://hydrem.ru/images/file/75343596772.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d139b2ebd---lufomevopigutokikokejabu.pdfIn PDF document text
- http://jjmcp.jp/userfiles/Image/file/posewizafa.pdfIn PDF document text
- https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/q41r9ldnbk1jk761vbqsd4ccv4/8297559502.pdfIn PDF document text
- https://weboonline.com/ckfinder/userfiles/files/16183162118.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ebfd7408---72557105791.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161146104ebf8b---26057881282.pdfIn PDF document text
- http://mestan.by/images/file/satulidizigoguge.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/djpfavfi5kv56qmlififtd12s0/muliworiminapu.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/4d22e03f8068f98d0e48f99484482170/1520516870.pdfIn PDF document text
- http://annamsaigonlaw.com/upload/files/80759447525.pdfIn PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b2cb8bb975a8c963962022dc74572f2f/kiromatexevif.pdfIn PDF document text
- http://meyergarden.com/ckfinder/userfiles/files/35094659503.pdfIn PDF document text
- http://atenngo.com/admin/sites/site/documents/womulesozirawixepelod.pdfIn PDF document text
- https://xn--nmqu14inmf.com/upload/files/fujuwi.pdfIn PDF document text
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e793.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE793	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ffa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFA5	17516 bytes
SHA-256: `74d29b3252e59694bf75d6505efaaf5d8acb140fb661b7f0f4ced125a0bc7c7e`
`font_02_sfnt_off00012d4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D4D	10748 bytes
SHA-256: `7a36e864647974e4058b02cb67db1ca14e140ce19d955d734f9d61e1e7f3a3dd`

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