Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe0e21ed2245625…

MALICIOUS

PDF

73.3 KB Created: 2021-07-13 07:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab2ae22943c53888064db9a28a1872dd SHA-1: 1131e014218fd049f2048d38e190d0ec4c59b744 SHA-256: 8fe0e21ed2245625f81493e3cf271c34734be75c79467f239d26fbf8f47086ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating it's part of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the structure and URL patterns are consistent with techniques used to host and serve malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbd9965f4e---podiwibireroxibexun.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608078d1a2b5c---17151700715.pdf
    • http://jshtextile.com/UserFiles/file///mamijewelolisarupagonaj.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/9ac33ad013dd340e7c388b34e9b7cd7b/lokiwibovobifixometeme.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1c7c1cec---43215841123.pdf
    • http://diplomat2014.ru/ckfinder/userfiles/files/nogozuselipitaxuwidota.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/30fac9dae3e96d023eb46fb35eab3c16/42991381335.pdf
    • http://koala-al.com/d/files/96719150423.pdf
    • http://kawoka.com/userfiles/file/47764458711.pdf
    • https://windsbs.biz/files/file/zibapaxojenez.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dc7ed3e20---19551598847.pdf
    • http://akinmedikal.com/uploads/file/71883308724.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/8r4aboupfnflg4vc6a6ar0hf13/fizemodu.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d502d7ab1d---kinepulatefotanatusofako.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/kr4jdb63a6muvmip3m6dp0ed1v/vufomuxon.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738da718d36---diwolokidikesewaje.pdf
    • https://ngoctraithaibinhduong.com/uploads/news_file/mujofudoxigalixi.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a1002a7bfda5bd68e6cee19810deaf8d/92308068169.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/f8db249978898abbef325d4357541642/18852234444.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a733f1207---jikuxux.pdf
    • https://majorsagilekvaros.hu/uploads/file/13497222487.pdf
    • http://hyderabadibiryanicorner.com/admin/images/file/tonab.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/s3p5rkjfuqnv9tao8krs70epoo/56842043219.pdf
    • http://pensjonatagat.pl/userfiles/file/68244153214.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca74d4df0e5---figuvowebulurinave.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=iso+12207+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4C 16792 bytes
font_01_sfnt_off0000d65e.bin
860b1757870f4b9c241a6dec365d691445bb0091d151ec85c085ca1f16e8eec6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 16096 bytes
font_02_sfnt_off00010004.bin
dcfaa812f6c15d5fdc6311a0ca506ff3c24c4d9ea266057e20c464cb3589ad34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10004 10452 bytes