Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b3ace4f359b4a8…

MALICIOUS

PDF

91.6 KB Created: 2021-07-08 18:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 545f23bddd347a76afc2629a8cd294d9 SHA-1: 08017ea372a8c1f46bf1c964f36c02d784467e16 SHA-256: e0b3ace4f359b4a8530130791a8c607101bb45749bd107964cc1736cf6df2514
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b927c4a028---88922154733.pdf In PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/db13de76fe6972c61a4e6c984829432a/60255866193.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96252405494.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/bezobidiluwulebavixite.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/dt4qnoivglctpltr4srkfqcrub/sodeluxe.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a801bd30382---ximuno.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/79999725726.pdfIn PDF document text
    • http://poorclarescork.ie/images/mowaropanojafimavo.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/30979226936.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/nojufixuziv.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16079b103ad0df---joxef.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/92627979762.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791fb1a26e1---24208607275.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/niledodevit.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/65304282166.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16070c3f0c3fad---dilupelame.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a19d113dab6---dobixezigoj.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/19274684919.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/b4b2c92358b95883cae60da2bc35d76b/354845932.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ukuo1g9e2k119rfhujs5fhihi4/mitajuvuwivuzelorotijozuj.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/69a08da09598481fa0f2ff9a61d5f3a7/zaramejekogoduf.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/litidimuwunexalawos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=free+online+ocr+servicesPDF 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_off00010135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11947 19604 bytes
SHA-256: a8b668819c48b06994164f2238ed71e9fd573598a669aa7aa4e92974cd6f5c94
font_02_sfnt_off00014b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B17 10008 bytes
SHA-256: 59a54ea1dba8a2119129483340cae219a9c98c44bd41c9d3f2a1de8f7e3acaf6

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