Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a050dd0caeec9a9…

MALICIOUS

PDF

62.5 KB Created: 2021-02-14 05:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0e0317ca9cddc5a55b881dd75ce5ac36 SHA-1: 944656cafbd62c6da767edcb35db8c2a3884e0d0 SHA-256: 3a050dd0caeec9a977e7b80f374dba47bbf992ab00dfbdfeeb7c10023dfab665
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct user-facing lure text was clearly extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=plastic+forks+individually+wrapped PDF link annotation
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/pebasugujatude_tisapimof.pdfIn PDF document text
    • https://lakogobeza.weebly.com/uploads/1/3/4/0/134096968/5511530.pdfIn PDF document text
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/eeba1b7d7a795.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/iepgihh/air_strike_force_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vazodowadu/whhcid6/67163466888.pdfIn PDF document text
    • https://zuxivojeduzudog.weebly.com/uploads/1/3/1/3/131381782/jipevosutobi.pdfIn PDF document text
    • https://xupovefodifej.weebly.com/uploads/1/3/6/0/136053951/miwufexedu.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/Ojihgia/friendship_pick_me_up_quotes.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/8da1b6b.pdfIn PDF document text
    • http://1xbet-football.fun/deguluremogawedisuzajera0czd3.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/gchajj8/break_the_glass_meaning_medical.pdfIn PDF document text
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/6a28f75.pdfIn PDF document text
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/doxazozubevadilus.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/29a3e69b95cdb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB878 5468 bytes
SHA-256: 04a5324077bd3c5ed2ffb4e6efe74e8846f6adf303a6017f8b8309505b8c00fd
font_01_sfnt_off0000cb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB44 9980 bytes
SHA-256: 6cae754c33c822ecf7c9a939144cdb5bb1a98eff2574d8ab402131c022881254

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