Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e90abe5443944cc…

MALICIOUS

PDF

73.1 KB Created: 2020-12-19 03:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6258ab268f35e882e4bc3b926e051653 SHA-1: 738f12ba56c36d4cd9b366736d049d83b4f9b95a SHA-256: 1e90abe5443944cc6e56027d7d4be3d370bf065c03868f82bba203ec41eda48c
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'trafffi.ru', suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=red+colored+contacts+prescription
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/4412206.pdf
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/f53c6f4db71c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/babc3c96-30ea-479b-8c65-0fa29d6e66aa/20393103433.pdf
    • https://static1.squarespace.com/static/5fdd2a692dcd53187f1e8c64/t/5fdd4f8bd85ca26442e7de89/1608339340081/fatosizev.pdf
    • https://uploads.strikinglycdn.com/files/be04eccb-40e4-42ff-aeb8-e0bf36110560/golf_my_way.pdf
    • https://s3.amazonaws.com/xufaxoferugod/pelouze_scale_sp5_manual.pdf
    • https://static1.squarespace.com/static/5fc14581c89e1c4b8fc0e725/t/5fcb30a911c29807e6d53c08/1607151789432/72239058081.pdf
    • https://s3.amazonaws.com/muxegeza/malwarebytes_anti-_malware_windows_10.pdf
    • https://static1.squarespace.com/static/5fdd28e788390d34f381f39e/t/5fdd2e8115a11837d088aec9/1608330882571/guidelines_for_medical_assistance_in_pa.pdf
    • https://s3.amazonaws.com/sajatesawodiji/lemifavililod.pdf
    • https://static1.squarespace.com/static/5fc5aeb49955c744b55c0b00/t/5fc611b264571256540c1dfe/1606816179613/fire_charge_recipe_ps4.pdf
    • https://s3.amazonaws.com/zamuriza/doduputenedemafumoxifazug.pdf
    • https://s3.amazonaws.com/safenalavojuwu/toefl_question_papers_with_answers.pdf
    • https://s3.amazonaws.com/pirofopafu/68183421904.pdf
    • https://s3.amazonaws.com/xefejevife/hidden_city_cheats_for_windows.pdf
    • https://s3.amazonaws.com/gupuso/90603047028.pdf
    • https://s3.amazonaws.com/wukevirenesu/46798459097.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7c.bin
af93401480d769208553adcd730b38e3572304c2424ce7af46cce029ab549650		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 5072 bytes
font_01_sfnt_off0000f0cc.bin
67b44d7adfde0547fb08fca723f66ef6fae59d9a9bc590234df04117bb905d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 10728 bytes

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