Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c299b3216dcf93…

MALICIOUS

PDF

94.8 KB Created: 2021-08-01 16:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 595fbbec8a1f52b775a533df284c9f55 SHA-1: 6f2dd9b84c869d6964d053c4754e4140a4fc7eca SHA-256: 32c299b3216dcf93e544db13e4ff1d9448472bdbe14ecb4bd3558ec2c2d56769
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to domains that appear to be part of a link farm or hosted on compromised CMS uploads. The presence of these links suggests the document's primary purpose is to redirect users to external, potentially malicious sites, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cl-pub.com/files/files/gazowos.pdf In PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54825244514.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/99572852756.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca431b5125---valelutaxeg.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/8f9f0b7ebd9949ba6850f6b6aa272b59/tobotigunujek.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062221483973499.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/87616143940.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/58jgliu1qa5jk6qu3ghprk1rcg/xobelaxudeleleza.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/44517211000.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/zawurojexak.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fcsejsm2d4d6ah3ndl5p996hk2/kagedufe.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/32d8ff672fb4aaaac9c1816997132479/39566914499.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/81595678985.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a8c4069a2---23766147097.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/0ea677a34c2d932c5c3e9299cb7ba705/13825973198.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/pkfhj6pih30j3u1gv4id3vmbhl/fixadupavepexowalasejumol.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/67c4f216cd3ab0023ba4b9ad4380d604/42481172793.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/hjat3crvnhor3td8t8ps70ap3h/4737773938.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/duwinun.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c920ce2ae7632f01df47aee371c1efc3/25222512115.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/satenabelelekakadel.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/h2pas937opot53rboofaps5atv/49989773315.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e771ab52a---661450098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=andrei+deiu+workout+plan+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 10580 bytes
SHA-256: 8c2a32a21b75ccc4f30f4474dc036ac6315c12b9717804b7756f45e28f40cb2b
font_02_sfnt_off00013f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9A 17452 bytes
SHA-256: 6a103e8c15ffd5bd2d92da76a03fe6b218680fa89d9006b343949c96979e7aac

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