Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0f2ce6b369cea8…

MALICIOUS

PDF

109.8 KB Created: 2021-07-12 22:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c0fbffa5bd24b602c24a8f085d5b0520 SHA-1: ea85e780140b5e256a98ab6b8bc170ef83473766 SHA-256: fa0f2ce6b369cea81116cb9c7c51392b6e58c5f31725b86db0472874ab28c935
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the 'link farm' heuristic indicate an attempt to distribute or phish via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f6e1bc485---sunukonakanibapa.pdf In PDF document text
    • http://tamker.hu/userfiles/file/33571343653.pdfIn PDF document text
    • https://alutat.com/data/file/30051199359.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/dosusozujigesezalup.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210616124323_1796664102.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/kblcpnj4u4dno6423oumepogvd/vuxomapoketadawoxulij.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55f56deae1---83669399366.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6250cfd3b---50573342000.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/2c155f65a96c60c71c7082e79b33260a/sabedijaj.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/58dcac7a4760703b4a051ba05e04f334/wolitugowibebiwa.pdfIn PDF document text
    • http://noahjohnsonsark.com/clients/e/ef/ef24418f2336b9480f3353ee42fa3f58/File/72395379309.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1t2mchlplbkfb31p5d9g0j04i1/34337537083.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6a64822c0---paturaroretabine.pdfIn PDF document text
    • http://anupbolivia.com/images/files/jinaxiwaperisotuwimup.pdfIn PDF document text
    • https://icbacademy.com/upload/files/pupasiza.pdfIn PDF document text
    • http://panteres.com/files/files/migokilogadizag.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/66666848578.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/92793716293.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/nopopamib.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607702ecefbb9---47073366635.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea64e2fad6---72287514734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=dot+product+definition+physicsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 10724 bytes
SHA-256: 69ab61e5bf3941d13567022fe4155698af3e241b683025f9c1d247a8110076be
font_01_sfnt_off000144c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD9 20268 bytes
SHA-256: db0086f6d636f4b764972d3e7929f2f09933e260fec0646b34677875bbc4b791
font_03_sfnt_off00019444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19444 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7

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