PDF malware analysis — malicious · 87e35e3a13a1e513

MALICIOUS

PDF

88.1 KB Created: 2021-07-31 19:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 7ce4cf9fb95314e596b9f5098a3d77b2 SHA-1: ffdd8fda6e835ec3a03ec5050f1992eaeb83ad2c SHA-256: 87e35e3a13a1e513d0501f4f7252e02eaed4287f959f566dde2256e3ef255fdc

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a visual download button further supports a social engineering lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://huntic.ru/uplcv?utm_term=zombie+catchers+hack+apk+for+ios PDF link annotation
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/900468bd2cdcec05861cf7f20a696445/vawutep.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608994bd2a2d8---79074266523.pdfIn PDF document text
- http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43f858fb6---xawedirodofemiterekozil.pdfIn PDF document text
- https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/520b7d47c3a10c7b0c4d2a9b50b13bec/65377574698.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/lpq4jo9qu28b6nvamfuhn6iou2/guzemi.pdfIn PDF document text
- http://auchli-appenzeller.ch/userfiles/files/12063530805.pdfIn PDF document text
- http://webinaris.net/ckfinder/userfiles/publics/files/7018032142.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098be4a8a283---9027465611.pdfIn PDF document text
- http://gongotour.com/FileData/ckfinder/files/20210728_0B6F70C132C136A1.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/340964ccf8597869888429c9b75213fa/vaxuvakawigazaraneratenuf.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/7121cac4d02dab9516fb0678158c9548/zipasitoxuwiwogar.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607267a602bf6---jolovagadetoruramipafuza.pdfIn PDF document text
- http://cokhisah.com/webroot/img/files/molifadenojipomapufoturu.pdfIn PDF document text
- http://aite-materials.com/upfiles/file/10668525381.pdfIn PDF document text
- http://nickels.design/ckfinder/userfiles/files/doremofovev.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/88990788295.pdfIn PDF document text
- https://anfauglir.com/images/file/xipofewadeliruzajipuzodek.pdfIn PDF document text
- http://brmxn.com/userfiles/file/20210622144609_0rmsu8.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/5ff541e4d826e2d50be6c9b004511b55/81179709233.pdfIn PDF document text
- http://mstreatmentadvances.com/userfiles/files/91898331791.pdfIn PDF document text
- http://360mart.net/uploads/files/zoxobuwegotejugamoxudoz.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/sqjn1ue4hk4v7i9jon38n9ng6l/gezukugofepizajovodaviku.pdfIn PDF document text
- https://cjsc.se/ckfinder/userfiles/files/26291640768.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d64c1bb36a---6509203755.pdfIn PDF document text
- http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/75953141213.pdfIn PDF document text
- http://greece-ex.com/images/blog//file/57475770668.pdfIn PDF document text
- https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f5ad6762ddba59f412214a71f9e9b0ab/xegulezimovirufazimixezix.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_off0000f18d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF18D	10788 bytes
SHA-256: `b1565f62a26849ab406e7cfe8d7e832abacb42b4922c50488da0eecfe1baeae8`
`font_01_sfnt_off00010a39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A39	18040 bytes
SHA-256: `e3cb3eea3f0e556b6a3691555daeca745cbe42258f936a5330f6a47fe7711739`
`font_02_sfnt_off00013a25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A25	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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