Malicious PDF — malware analysis report

Static analysis result for SHA-256 c612a88686e1edd1…

MALICIOUS

PDF

88.9 KB Created: 2021-02-12 12:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10c90da28e2853ace4d94a1ebf7194c0 SHA-1: 820c7f2af6c3629c22579c77cf9ecbdf890308a8 SHA-256: c612a88686e1edd181a7de892cf23612cecc66b3140a6531169522ee9fe79a8d
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of a link farm heuristic further suggests a malicious intent to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=minecraft+bedrock+hacks+pc PDF link annotation
    • http://aycotoro5.xyz/bajo_la_misma_luna_google_drivez0jd3.pdfIn PDF document text
    • http://wbigs.space/baroness_pomegranate_mask_sheetkguw4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_601f00804c750.pdfIn PDF document text
    • http://freshremont.com/allahabad_h_c_group_d_answer_keyshjba.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/622511b.pdfIn PDF document text
    • http://particulieres-societegenerale.best/6799839313w1o1t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415944/normal_5fcc16e988f82.pdfIn PDF document text
    • http://fertpin.online/asus_tinker_board_android_thingsp1aq4.pdfIn PDF document text
    • http://vanlit.ru/disinaxizaxuzirokajotu4i382.pdfIn PDF document text
    • https://perepori.weebly.com/uploads/1/3/4/0/134016710/dinupomoxeboxijizimo.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/5047735641716ilc.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/a30002.pdfIn PDF document text
    • http://topmassage.net/56831003208of6zg.pdfIn PDF document text
    • http://otomail.business/4255541858jd988.pdfIn PDF document text
    • http://wgathering.org/anatomy_of_eye_bookpmtdv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fdf9ab6cb2a8.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/3344931.pdfIn PDF document text
    • http://pek-24.cc/tasadl44nz.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/sodefawukedav_joxirejevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD0 5420 bytes
SHA-256: 293423ce4f4c76e85c58a8ea7da11f06ef8a85b6a57c838dbb9d2a9c4f8cb896
font_01_sfnt_off00013244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13244 10716 bytes
SHA-256: de41447d7b15d0651235888b89269d92317156554af794d8bc6aa3aa61391e0e

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