Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cc0e7725fe8101…

MALICIOUS

PDF

99.3 KB Created: 2021-07-08 01:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c16f7e34996bae532269c49abae24c40 SHA-1: e5cd2c74599d771e81f5811ac8bc0d4b65387e78 SHA-256: 42cc0e7725fe81011c079043233d923561eab8c747c2bb510c5c7506f3735fb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress sites. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The primary attack pattern appears to be directing users to potentially malicious or phishing content via a series of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://queure.ru/uplcv?utm_term=thin+lens+experiment+lab+report PDF link annotation
    • http://jshtextile.com/UserFiles/file///74621961731.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/5eb46b823bb4e40f1b89e46f38aab14f/62594025731.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/0d2342a61cfa582c3157951d905d87f3/depelajabipuroxasewotap.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/jiup7jabdl9iklk7vn9731cvc9/80380770696.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e6561a1d6---55683645691.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/p48ajpbjibh537902d8pp956s1/64794106668.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/75612624172.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/4109f77241db8f66d723aad762fd69f7/97235352501.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098429d4756e---kefowobazogu.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/988e940b26c339380b10b9a81db56136/zekabagakebodekale.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/48833805160.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609299d8d9c4f---lukozudolulizitetera.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/10807627936.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/1cfothb19ptp12k80ifa266s90/32670941234.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/2b9d3161415d60d95a993afff9b1d94e/xugibumixasemuk.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/15563343856093c30d1a9fb.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/figupiwatevevi.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/cf6928cfacdc72a1f6ca48b336d76ddf/segadopawiva.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/82111115931.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609604cd516d4---49577225302.pdfIn PDF document text
    • http://carszana.com/image/upload/File/suwozamagonetilo.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r6l9g3rg2jgtvpaojvdjcvs3fv/pavazodi.pdfIn PDF document text
    • https://immobilgold.com/file/88730428692.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F79 10720 bytes
SHA-256: 17a51d4db41d1b49b6b690d84f9fbbea6cf1e020013c910fb2726f1978e8308c
font_02_sfnt_off000157ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AB 15800 bytes
SHA-256: 2a30c29d35e7d963626873b8bd64d2285a712f8c5e5e7027d5f3de7e60fb6a5f

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