Malicious PDF — malware analysis report

Static analysis result for SHA-256 7630f024801e111f…

MALICIOUS

PDF

94.2 KB Created: 2021-03-29 00:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45cedb706e77c91d5e4a8dac8acb9338 SHA-1: dd0896563aeeb255611dca062b7b04c2a50add17 SHA-256: 7630f024801e111f67bf9b43059e3c2801f68127fbac706c0f2854fe2a41c5c9
126 Risk Score

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 0.9992

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://dugedepap.ru/wix?keyword=human+population+growth+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425909/normal_601a08a51f74a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458412/normal_5ff7fba333523.pdfIn PDF document text
    • http://sukujugonada.22web.org/kevuzef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fd63d5c84995.pdfIn PDF document text
    • http://milansit.space/xipifefafosovaxo8beoq.pdfIn PDF document text
    • http://tufipenuvabiwed.iblogger.org/reportage_orchestra_france_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_6033849386798.pdfIn PDF document text
    • http://bioforcecolumbia.site/jurofexewedomafupipdbgv.pdfIn PDF document text
    • http://fasabewaxivotag.iblogger.org/blackleg_disease.pdfIn PDF document text
    • http://milanomoda-italy.website/mazizidopeluvuxefijosl2so.pdfIn PDF document text
    • http://fexefimaga.iblogger.org/ordinal_numbers_1_31_exercises.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481400/normal_5fced92ceb5fe.pdfIn PDF document text
    • http://bit7.top/how_to_fix_leaking_dehumidifiercr16x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55ffb29-d325-48e2-9ba9-d4cf934cd6f0/does_my_2013_ford_escape_have_a_recall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5663c153-0a53-409a-ae71-bac9c57ef532/kisiwusatetejud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed85b16-4ec3-439c-b950-2178fb7f1ecb/wisazenibotorudagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b5eb48-7cc4-4291-bdf2-deb25993c43d/vojexesatozijaximak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876fb382-dfd4-4e48-bf94-c07ad93168e5/80689989097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c224ea-1da1-4fc2-a1d0-fb7eff029377/whats_better_mink_or_russian_lashes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6827f8ba-e8be-4e5e-993f-da515b1c829c/nexexofemilaxud.pdfIn PDF document text
    • http://xivivafin.rf.gd/49477556058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a4ee1a-8a35-4d1d-a709-d6e280796c31/dogoburujubad.pdfIn PDF document text
    • http://xevemifura.rf.gd/black_amoled_edge_wallpapers.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_off00012f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9E 5352 bytes
SHA-256: 475560f53bddf3c3ecab8d34e0c0c16f12fbf49bcca707658c7028ea6b9858c0
font_01_sfnt_off000141af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AF 12100 bytes
SHA-256: 263951243d7b1228277a3a29aa62a722b8fdf484531ff39e00280f277460f123