Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ebc91f6d520fe0…

MALICIOUS

PDF

75.2 KB Created: 2021-03-25 09:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 119027e189ee7eaac598fb2ed75020b1 SHA-1: f8c9d87d22e9309cfae265b66713e0efb57d7397 SHA-256: 62ebc91f6d520fe033f060e25c7b6b2a9db08e691a97440d2729fae3d7f2c40e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to malicious sites. The primary malicious URL identified is https://midufefew.ru/aws?utm_term=what+does+it+meaning+to+have+a+molecular+structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://midufefew.ru/aws?utm_term=what+does+it+meaning+to+have+a+molecular+structure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407795/normal_6007a40972b5a.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/jCogLWe/mewafedebesobipiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcfaf9e36d6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fc948c28f27e.pdfIn PDF document text
    • https://cdn.sqhk.co/ziloteduxemo/dEEtWG0/modern_history_book_for_upsc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_600e3187d6133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5feb2fe3a32a8.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/0h1jcz7/10602185044.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/jiWYLhh/72599447076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_604d1805a189c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5fdfdd26c66ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_6031ef00287f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/020e2cd7-6f4c-4301-9da3-c6695f324c13/how_do_you_clean_a_keurig_coffee_maker_2.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca899a62-7933-4e5e-8cef-230555ad49ce/bukoxafod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d60861-22ba-42ba-9877-a6272ec2d464/elvis_and_nixon_movie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcca81d2-e709-435f-8f56-9f8ed26fb90a/60289270702.pdfIn PDF document text
    • https://4da44922-6ee1-4515-aed7-54c3d6b51f77.filesusr.com/ugd/243a28_5737c263666f4970ab2ca39d144b90af.pdf?index=trueIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_c83f0b2d9c924d85ba0c23c7be2fe361.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_a2d02fa56e764b92b0d2e2e4fdda2d82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d861135-ce48-4321-99ba-8b51d2197105/busir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bfb580-fdd2-423e-a58c-56dabee90745/78610965927.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_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 5428 bytes
SHA-256: f447015c3f05de3aa7403e089dd0b98b99c4009c529853fbc07925fa458d16a3
font_01_sfnt_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 10500 bytes
SHA-256: 00d3e5c6869896647359c281d15a0c1babd757597d6df6d4a162548a78575ea8

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