Malicious PDF — malware analysis report

Static analysis result for SHA-256 8467d5021cee5bff…

MALICIOUS

PDF

103.7 KB Created: 2021-07-31 22:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f584d8a720dcccc65d9c1e51ace7a8b4 SHA-1: b1168b9159bd9d2b0a8c19dac933ecbaf3345b87 SHA-256: 8467d5021cee5bffed3fc22192e682c90089645302e483654bd59c9b2018d456
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malicious content. The presence of a link farm on potentially compromised infrastructure suggests an attempt to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/831aef7a814a05b02cf5eb9fcd96f853/38861883015.pdf In PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cc9abdf21d655fb6376e9d1048195be/80296846085.pdfIn PDF document text
    • https://aspirans.com/files/file/jusonupiginenu.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e834007e9aa---69043270599.pdfIn PDF document text
    • http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/72088970823.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/pewogakekoze.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/rudun.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/xesuderopofepoturafigewi.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/22350868373.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210709_044130.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f566bce3fa---jegolag.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16078c70b664a6---75006308255.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/xitojusapu.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/vebedusetoxegiroj.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/84470351230.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/34376847523.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/didarexajilojiwuxuxefafe.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/djs9eqbnff9dl6qcimggtl6lrp/5513275776.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/23324011a96f9692d87ab4ad9f6fbf8d/vilofidalutovurexenumu.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/zabefaporenifetosoxalolew.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/3363065533.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/lijikugeforebedoxo.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/70838814894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=watch+catch+me+if+you+can+online+free+fmoviesPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307C 17632 bytes
SHA-256: 292e97c8c39046a9e40e7d9327e110356c9bed016c758bc4f038d3f5446ab60a
font_01_sfnt_off00015ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000176dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176DC 10872 bytes
SHA-256: d73678fa42b360bcee75e690d29770aad408e7a5de4479ba8a47fbababa8a604

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