Malicious PDF — malware analysis report

Static analysis result for SHA-256 5078632903bc4460…

MALICIOUS

PDF

78.8 KB Created: 2021-03-04 20:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3c6c70f19b956eddf604fe0faf3df1d8 SHA-1: 404ec79b47add1dcc1946b20724611a255d1135b SHA-256: 5078632903bc44607cddb40bf9d648b252e49627c1646b28ebba4127db0bda0f
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to statistical analysis, directing users to potentially malicious sites like fokemale.ru. No scripts were extracted, but the overall structure and URL reputation strongly indicate a phishing or malware distribution attempt.

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://fokemale.ru/strik?utm_term=how+to+calculate+vif+for+categorical+variables PDF link annotation
    • http://tixshopclub.fun/98804029116dppa6.pdfIn PDF document text
    • http://stopnutristrike.ru/html_to_phpnflam.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hijCghX/tupijuvirijopanerobosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_602ea2dc777e1.pdfIn PDF document text
    • http://wbigs.space/lunawomuliym6q.pdfIn PDF document text
    • http://natikolom.site/jessica_nigri_lingeriepdvwk.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/cvsgjbw/20544135550.pdfIn PDF document text
    • http://raifaisentapp.online/muperavesatuxopodi9x8ho.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/fq8jegh/54444760213.pdfIn PDF document text
    • http://lidlid.xyz/migalomanajixigoginufu7xeat.pdfIn PDF document text
    • http://vash-fasad.live/520528191288usz.pdfIn PDF document text
    • http://eglo.club/cen_tech_scanner0su0k.pdfIn PDF document text
    • http://xitnet.fun/16840523726dtlfo.pdfIn PDF document text
    • http://moresukko.ru/tobijodezifedowobir94rb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5ff880dd9b3d1.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/4cjhgY0/zililidupejudoxuzab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_7363ffeb56414687a3dda32fa41833d2.pdf?index=trueIn PDF document text
    • http://petafifagaj.rf.gd/youth_football_training_drills.pdfIn PDF document text
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_7bcd1d1cbd5941e68a59e04dba14689b.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_6229e83d4b9c43d3a296cb62f92aefa4.pdf?index=trueIn PDF document text
    • http://ninukak.epizy.com/lojadezezuriwedebejuf.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_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 5304 bytes
SHA-256: 5f2ff45dd73d8a10bb17d8e54d75d5c7fa751afd11c7d6f6aad121614966b66f
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 16432 bytes
SHA-256: a34d12ed20468ebb555be77c6e63f34df5ff8498bb18e7b6b08c5f292846aa88

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