Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1b20aaac3456bb…

MALICIOUS

PDF

77.4 KB Created: 2021-03-26 19:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5dbbcdc0208939dabf8fd8afddf065bd SHA-1: 734bbc4c2f427e9b5dc7e2039c7fee8cf7d5ca27 SHA-256: de1b20aaac3456bbba713614b049ad7d12ee66a72ea55c0111574a889e0d31ed
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The primary URL, 'https://maypoin.ru/award?keyword=cause+of+land+pollution+pdf', appears to be a lure for users searching for information on land pollution. While no scripts were directly extracted, the PDF structure and the presence of many external links, including one to a potentially malicious domain, strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://maypoin.ru/award?keyword=cause+of+land+pollution+pdf PDF link annotation
    • https://cdn.sqhk.co/fesakesovoka/ijagdgh/jixubugilas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375077/normal_6007b50e84035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_604b8ba5de1b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480878/normal_603aee826f0d2.pdfIn PDF document text
    • https://cdn.sqhk.co/manizamo/hij2hqZ/fun_facts_about_mental_health.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/gazijewevan/what_does_no_stops_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/55985331112.pdfIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_6a9a245de56846079b07598b4d23348a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/984f7812-1cb0-47d8-b8ce-9f3acd65ec5c/25157244218.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_4aeca41b366d48a29d793082e466b04a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/357c02c0-49aa-4edf-9e30-922a3a3e2022/fugonujul.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/convert_webpage_to_chrome_plugin.pdfIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_4816e6681aa34898a96b3f4394b953e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/agatha_christie_disappearance_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/tirijedesimaginug.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/bollywood_movies_list_2006_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/rubber_sheet_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/33702333548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09cd352-9226-4aec-b4b6-36dab97b4c6d/vijarixefadepududabe.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_f6ebd5b71ee2449aadab9e4ba2fe78a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurafoga/antibody_drug_conjugate_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/how_to_clear_bluetooth_memory_on_pioneer_avh-p3400bh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8f4934-809e-46b6-a115-97f98d5c48bf/lifapeloxirir.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_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 4844 bytes
SHA-256: d8d944d3ce374568c88fd43bacde8a4a357afa496ceb43d7942570ad4e41851d
font_01_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 10336 bytes
SHA-256: bd54537ccdc5a3ba52ffc43911ea3db4ce42ca38f695a55d6e4928dbfabc54e8

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