Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe28b67ee0b22960…

MALICIOUS

PDF

69.6 KB Created: 2021-03-15 22:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d761122a6e641dab4aa345023a472a0 SHA-1: 1396505c370bcab176ea1e342ec64b8e30fdd59c SHA-256: fe28b67ee0b2296050242b235b59138f0ecc893c7765ff9c475b7caa90b0c3ba
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://crophysi.ru/strik?utm_term=best+tomato+sauce+recipe+for+meatballs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416796/normal_5fd7ce5cdcb83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_6043b2d5e2f81.pdfIn PDF document text
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/4394067.pdfIn PDF document text
    • https://cdn.sqhk.co/tarolaser/ib78icE/server_build_pc_part_picker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_60217ade24ed5.pdfIn PDF document text
    • https://lakafirawitekir.weebly.com/uploads/1/3/4/0/134018328/8838165.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/23c5ea52bbbd486.pdfIn PDF document text
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/00cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424347/normal_5ff174b041881.pdfIn PDF document text
    • https://gonewama.weebly.com/uploads/1/3/4/0/134095907/2107241.pdfIn PDF document text
    • http://surogufepisim.iblogger.org/nudibranch_identification_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/endehab/alien_shooter_hack_ios_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471683/normal_5ff8a94ed6840.pdfIn PDF document text
    • https://gumotamilo.weebly.com/uploads/1/3/5/3/135319527/9561286.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/iehgz1F/95659877456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_5b27e3e81d42458eb6619ca2bb9917e1.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_09a67194a34e4d3ab4b80871b3d00412.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_a42d6681af9c438cbc08a20c1b3ac36b.pdf?index=trueIn PDF document text
    • http://pabipinipimano.epizy.com/kojesovep.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_c3df51e8e89e482db783cd51562a6526.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 5348 bytes
SHA-256: 0534d47d4076f6957065f8e2d958c0e5b7678ec65b70ed2460b75a7e15ea9056
font_01_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 10476 bytes
SHA-256: fdee5d302ebe9c71eac5659a47c9eb3f3af0d81cc0e0b6bedc82ef1266fd3ff2

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