Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d826068bb3836ef…

MALICIOUS

PDF

69.4 KB Created: 2021-02-21 16:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a72da11c4f08f2c5c4f66ae8bcc5d80d SHA-1: e411bfb5403c2abf3326da9b3530e76ecb97c16d SHA-256: 0d826068bb3836ef9b647a76934d8466dbe155c5f5c6eb33601fbdb85869fd61
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, indicates a lure related to "Tuck everlasting chapter discussion questions and answers" to direct users to these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=tuck+everlasting+chapter+discussion+questions+and+answers PDF link annotation
    • https://puzugisebo.weebly.com/uploads/1/3/1/4/131438758/sajexumasex.pdfIn PDF document text
    • https://kezugavamatuwe.weebly.com/uploads/1/3/5/3/135347357/5751394.pdfIn PDF document text
    • https://fotawadibegul.weebly.com/uploads/1/3/1/1/131163643/5283648.pdfIn PDF document text
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/4508385.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/logisejiwit-xazuxamog.pdfIn PDF document text
    • https://detifurotuso.weebly.com/uploads/1/3/5/3/135321595/6432551b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_5ff6222a8740d.pdfIn PDF document text
    • http://retapobu.iblogger.org/windows_7_ultimate_brightness_control_driver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_5fd7d68bdede9.pdfIn PDF document text
    • http://dunizajo.66ghz.com/79144855397.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/gofojesunerojosiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5fef83becce03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luxelula/canon_laser_printer_lbp6000_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/free_clipart_retirement_party_invitations_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/facebook_app_for_windows_10.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 5624 bytes
SHA-256: 1ff99a10def599f1a6f9b62d088b3b97c65982f777ec269c1b493bb17fd58acc
font_01_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 10444 bytes
SHA-256: 9424e0fc2ad998b36b4a21ccd54a6a43fc4a38d53bd7881ceb843d0fbb612f0f

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