Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe430351ce779aa…

MALICIOUS

PDF

74.1 KB Created: 2021-06-07 05:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eb866c26aa9f022116a2b722a220e1b5 SHA-1: 462e31cdf2f0af1328d503d3aecdbcca773d34a2 SHA-256: afe430351ce779aa6889a382ffad72eae77874790216edeb5d67bf07f2bb63a1
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 0.9997

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://queure.ru/pbw?utm_term=wordly+wise+3000+book+6+lesson+6+answer+key PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4365620/normal_60b1b8fdeb96a.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4457318/normal_60b24df7e94e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416927/normal_5fff4ded4f783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_5fdb87cd30f7b.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/6506552.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4476268/normal_60b74c7ae29b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494893/normal_5fcf47e2f2060.pdfIn PDF document text
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/97b705d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_5fd7676d4110b.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/dimimozupime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496577/normal_5fe7ee06f2303.pdfIn PDF document text
    • https://muwevazed.weebly.com/uploads/1/3/1/0/131070925/dd5354842a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_60002733c63eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144497985/3444010602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2da579-c7e8-4796-9177-2b29ba2df08f/ejercicios_de_ecuaciones_exponenciales_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8417ca9e-ddcc-49e3-b72d-63928b2870fb/washington_state_department_of_health.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f93fecf-df6e-49cc-84c2-33c0ba3e5704/44046034514.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144534141/sivavepumizuselag.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/bileik_kredi_faiz_hesaplama_forml.pdfIn PDF document text
    • http://wiliser.pbworks.com/w/file/fetch/144762822/9193717869.pdfIn PDF document text
    • http://tekitejug.pbworks.com/w/file/fetch/144670059/t-mobile_syncup_drive_review.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_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 5692 bytes
SHA-256: fab7677d7dc49a6403726cffc32993dfc49ca3af8d4b76ccedb351f175feb6e6
font_01_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 10972 bytes
SHA-256: 3ec04ba00ce59e3e850823e6d9fed8d9662dfe9d87a87d6ac16fe1e48dde2316

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