Malicious PDF — malware analysis report

Static analysis result for SHA-256 842e1883ff144df3…

MALICIOUS

PDF

84.7 KB Created: 2021-03-25 07:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2d382818dc981c6d0a5ac29d5d5cae9d SHA-1: 6d59c0f391070fa782162b9969e720ea43b3fd7e SHA-256: 842e1883ff144df3ea2936991920b57b6a019b31293c9389d731a583711bdaef
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://lozipotod.ru/wix?keyword=level+f+answers+reading+plus PDF link annotation
    • https://tufezojaf.weebly.com/uploads/1/3/1/3/131384552/07b65e2614d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490365/normal_605abcf52f9bd.pdfIn PDF document text
    • https://tofajoxoroj.weebly.com/uploads/1/3/1/6/131636991/ddd0670b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480149/normal_6006f87700a43.pdfIn PDF document text
    • http://infokurs.design/13735834874s0cp6.pdfIn PDF document text
    • https://fimopoki.weebly.com/uploads/1/3/4/0/134040487/9968601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_60291d35cb90b.pdfIn PDF document text
    • http://podarokinsta24.online/angels_stadium_seating_guide71f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_601542b78c677.pdfIn PDF document text
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/reseli.pdfIn PDF document text
    • http://trastqort.online/xotodabofaba0o6o.pdfIn PDF document text
    • http://znohist.site/pocket_holster_for_ruger_lcp_380_with_lasermaxthu1j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_604cb83665ea5.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/xutomoxu/6797483945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3efdc14-2cde-4899-a661-1662d121b913/me_before_you_streaming_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f87640f-8f50-4efc-8008-b8d88cb7038d/rekolovitafinaxevoxufaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585379fe-3a3d-431c-bd17-1cf191b368af/28485948472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e8854e-b2f1-47f2-b2a1-99f7cab50c74/duremazofuporine.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/zupibumusuzonavulaminujen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e797d5b-a925-456c-9176-0ae3f39bac1d/what_are_good_5_year_old_books.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_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 4992 bytes
SHA-256: e31f1581851cd627bd9d5e39ad8a77af76d94bb8e117dca96bb3c14fb321f226
font_01_sfnt_off000112fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FE 10764 bytes
SHA-256: 8252c4feb3fddb961ed2f9d4e900b4a7e92839b4a08f1801efadc8d5ea358698
font_02_sfnt_off000137aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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