Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ad0ac7699215c8…

MALICIOUS

PDF

86.2 KB Created: 2021-05-20 04:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 29269d15d1c589af670d9cc1312c450e SHA-1: 2bca7336f9a854a961c2cb256c4c0e9700f96ab2 SHA-256: 40ad0ac7699215c8042978afa92a43e644910e40892aba63109e2820a1b8d073
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains numerous external links, with one prominent URL leading to 'seumenha.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to game development.

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://seumenha.ru/strik?utm_term=how+to+make+a+shooter+game+in+scratch+3.0 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447250/normal_6022c9223e8d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fc86151e07e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5ff9b3dce27b3.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/2064860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5ff7bb29ddee2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416798/normal_5fca040f9ad59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_606a33a15048f.pdfIn PDF document text
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/4dfb143a77d0ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_60649a6578941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_603f004ec2cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_606ccf47ef2cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496146/normal_6002d20602317.pdfIn PDF document text
    • https://dutegonuguval.weebly.com/uploads/1/3/4/3/134310875/1dfeb1b2f845156.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/woxojuxafopuv/sheep_brain_dissection_analysis_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fde2ad3-334a-4415-acb0-1f191b7c0758/statistics_for_the_behavioral_sciences_9th_edition_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5d20c5-539d-44fc-838e-0a6f1a3b27b1/67377086585.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/20414285609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0804de0b-023f-45bc-abe5-0d0db3f7e79d/what_is_the_salary_of_a_guardian_ad_litem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1533c441-7cd3-4f86-b2c2-dbdc0ae7af30/dizajejejuseziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6232875a-800f-4a1d-abae-96efe114aedb/3516937825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9251dbc8-b547-4f3f-bae8-5c6a25d8dd03/browning_a5_choke_tube_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/how_to_evaluate_a_strategy_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d129e8-fcd8-4442-806c-d2efc4c26a79/what_does_number_222_signify.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f15d9b-3cc3-45c5-a8b2-104b5db1cb27/defozenadeduk.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_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 5636 bytes
SHA-256: b7a98381508402e8d1da56b3e589d6130111bacafb424601f840696f5d7cf188
font_01_sfnt_off00012792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12792 10340 bytes
SHA-256: d6aa0b237cce43f05ab2b862212560bbb90a89b5723cb54806efc021f2497d8d

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