Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94ada438f397f66…

MALICIOUS

PDF

72.0 KB Created: 2021-06-12 17:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 95559d6a5d10a88c07b33e9f0e04d5cc SHA-1: 5173e2539ee04dd7ffeff7745b2c9b7e9327361c SHA-256: e94ada438f397f664fb101c24968de28806a3c52e62f11502fa05e993d46a612
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://crewmak.ru/pbw?utm_term=aperture+shutter+speed+iso+cheat+sheet+pdf PDF link annotation
    • https://goweruvewej.weebly.com/uploads/1/3/6/0/136015665/xigifewezudaregoliti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_6001db8106a43.pdfIn PDF document text
    • https://kopusitubo.weebly.com/uploads/1/3/4/6/134698796/jexuxedifa-lemeku-dopedexabokok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481282/normal_604356dd579cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5fd80b60c1b81.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/pobose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387031/normal_5fff09f27acc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505358/normal_6001a90329355.pdfIn PDF document text
    • https://peniluvemafoni.weebly.com/uploads/1/3/4/7/134705148/345d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_601388c6edb5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_60150de31b43d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_60520dc1e9e92.pdfIn PDF document text
    • https://pegepefip.weebly.com/uploads/1/3/4/4/134455730/8124187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5fd3c037afda5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozapagula.pbworks.com/w/file/fetch/144781914/related_studies_about_tardiness_of_students.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426477/10424096106.pdfIn PDF document text
    • http://biduzoku.pbworks.com/w/file/fetch/144657054/demoxurelujane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe72b38-802b-4184-9029-8163b5d4c4c0/hp_deskjet_2547_wireless_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b5ba7a-89d5-4b66-8ce3-5ba0b2a4ee86/63257749624.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/julewekakewus.pdfIn PDF document text
    • http://vatezerajigo.pbworks.com/f/10937938852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e57a5ce-209f-4483-9a5e-0234fae242b9/92747225663.pdfIn PDF document text
    • http://latijanitus.pbworks.com/f/xuliziwubapar.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_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 5200 bytes
SHA-256: 24a47d20d6d8da60d1a688ffea8a065a379f31b119c6e5374da6712697f0e014
font_01_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 10120 bytes
SHA-256: 64e03f22509ca3ec7f3b0fc15fa6db80e1dfaccc97a834e032331da9e9ead9f5

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