Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e173f889b0e644…

MALICIOUS

PDF

73.7 KB Created: 2020-11-30 21:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: af5f888964be566e9694f89ccae656dd SHA-1: 157da65d5d1d50d457f62b1e0e0dd2423378ddbf SHA-256: b4e173f889b0e64482b88a223c26a56dda5afc6367dae072ba7f9b44171882ad
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. It contains numerous external links, including a link farm detected by heuristics, suggesting it's part of a larger scheme to drive traffic to potentially malicious websites. The embedded URL 'https://traffnew.ru/123?utm_term=war+of+art+resistance+quotes' and the first link in the detected link farm 'https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/xazazo-kidomave-tazavofiluze.pdf' are flagged as primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=war+of+art+resistance+quotes PDF link annotation
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/xazazo-kidomave-tazavofiluze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fa56d20ea6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f889f19e285e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f8dea33e7a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_5fad62a28b835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8a9c6846be5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501961/normal_5fb35ca26b158.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/badodemebo/98252618403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3193c3-3c67-42d4-aad9-11140b4f8156/rigoworojazajerinemaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/sebulamivaziwado.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/17243915587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25075b0-a8ce-46d9-967e-973f5cc228bb/56544075941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb828167-2c70-483b-a629-ef0ff648d1a8/miles_egal_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6201d3c-1967-4ae1-bb66-e83e9fba8806/santhosh_subramaniam_full_movie_download_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 4864 bytes
SHA-256: c3c5b615b94f028e47382af3798d3dbbea87b6a687bc18f523a330e6ca3d88ee
font_01_sfnt_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 10560 bytes
SHA-256: 4c48762d525cb3f50784038a5cae76ea3e36135b4762ec95ec0353f76560dc89
font_02_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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