Malicious PDF — malware analysis report

Static analysis result for SHA-256 807e93dc0d432ba6…

MALICIOUS

PDF

92.0 KB Created: 2021-09-01 07:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: d579b904dcee3f7a5053aa8be0aca9f2 SHA-1: d657ed59d56daf17f80e059d200c66f3f1e0f6e7 SHA-256: 807e93dc0d432ba6ba4c28f3222c040b770b21343a32b9d2ee32d2c334207b2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://philabc.ru/uplcv?utm_term=foxit+pdf+converter+to+word PDF link annotation
    • http://travelspace.pl/userfiles/file/dipop.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/a36c11ff2fe3bf4467c6e48176e1689f/kebuduzalakiji.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac896bfaf---93813136483.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/89477641016.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210803065633.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ktcs86a03kaoql96p0bc6s7ic1/donova.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b9c0b1ac43d079104cdeb0277a9c4243/35280903039.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/ririvujenezunakawipoz.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b495f4888f7---nokaxipirozalejosoj.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/54634686213.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c4066328e---luxulularisizapewuz.pdfIn PDF document text
    • http://halmar.info/userfiles/file/xevanikikokijevuxaxa.pdfIn PDF document text
    • http://masonhn.com/d/files/lefedilelinapupiwule.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8a68d80af---75214358639.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d248c13f846ea8add4135c0879127eb7/98268810530.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826ea8c4511---wukutasajexujex.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/97031620214.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16118940cdaa9b---83576763202.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5230fec68406308e166f92f3631af75b/vazalaravisupem.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/jidasot.pdfIn PDF document text
    • http://chieucoingason.vn/files/jonokezipupofunimexe.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/449aeffc8d1211ff42f5c322c7d0d696/kijizevo.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c631d067f1c---sorijuxaruralabe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 23204 bytes
SHA-256: d6a99eca0049be5506cf4f02fd65ed3ff5de73a2938cf8ae1488a1b6fb0eb9b4
font_01_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 10468 bytes
SHA-256: 07a0ff8e19a89885671e64cfbb66f9244c7265097fd7b8629a9f9012740f16fd
font_02_sfnt_off000133be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BCF 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59

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