Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3394054fda5700c…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 14:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 03fc7187bdeeefff0849913544e03769 SHA-1: 53edbf6c60b6007a7c6007f3b2db15b57439c9a8 SHA-256: b3394054fda5700cc508f08ab922f9f99cb8edbe5f94d9c31c3d90f10786f227
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/award?keyword=arariba+plus+historia+6+ano+pdf PDF link annotation
    • http://hotita.space/638068511044h1r1.pdfIn PDF document text
    • https://gilowowiwojet.weebly.com/uploads/1/3/4/3/134314399/bovum.pdfIn PDF document text
    • https://velineninebag.weebly.com/uploads/1/3/4/6/134608195/4043206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421201/normal_5fe4e8bcd5e7a.pdfIn PDF document text
    • https://kunubixofatefif.weebly.com/uploads/1/3/4/0/134096788/raremibidogug.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/Ebjc1FP/money_maker_lyrics_fredo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_60358abe9f6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_603faed6616c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448719/normal_5fcd273d14bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/cjbM6Ij/basic_english_translation_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ffb993a44b0a.pdfIn PDF document text
    • http://gaydating.world/gowadorukejemnj9f.pdfIn PDF document text
    • http://fitokaps.xyz/22655285198p8l7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5fc82dc9cd648.pdfIn PDF document text
    • https://bepixumute.weebly.com/uploads/1/3/5/3/135302933/lulisawimakufif-zivuxitimike.pdfIn PDF document text
    • https://lonugawewubosil.weebly.com/uploads/1/3/4/6/134627014/wisagi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379616/normal_5feb26ab32f62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_ec4be168ac7948c795b25226e260d57a.pdf?index=trueIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_6f2dac0c16fb4185b2390dc1a2b16646.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_89e04d28199b48c98647b5de2c0ecf14.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 5412 bytes
SHA-256: 6a4d18fe8992ae358b3770c436b9e3dea7963bb029f3bad6f7567db08ec0bd01
font_01_sfnt_off0000fb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB09 14120 bytes
SHA-256: 231992c299a2adbb8415579c5f330495737ebd99bf4461825ac16b049504e06b

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