Malicious PDF — malware analysis report

Static analysis result for SHA-256 179d9cbb0da8b37b…

MALICIOUS

PDF

71.5 KB Created: 2021-01-17 20:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bfa1baa0b1935369c72c9f85be5e0ea5 SHA-1: 71028241c3d150563164d3f66d218e92f865cb0e SHA-256: 179d9cbb0da8b37bc2066609225fe75e6446cb13fb566118e53907dfe9a42099
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of these links suggests the document is designed to lure users to external, potentially harmful, sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=catalinbread+belle+epoch+manual In PDF document text
    • https://cdn.sqhk.co/gutemokerezo/EQ7hgEf/galaxy_bowling_3d_el_juego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445892/normal_5fd2f7ff7e095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_5fa90eb29180d.pdfIn PDF document text
    • https://cdn.sqhk.co/naxetimi/ggjZRkd/53540514076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5f8d87bd28cd3.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/gavilili.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/h9p3ria/guzamowukuxejamutumo.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/Hifhhgi/ice_hockey_rinks_open_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luselobek.epizy.com/82231019543.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/17443215812.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/dusaluduwugabozeno.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/feretidalofoni.pdfIn PDF document text
    • http://godemesefiw.epizy.com/jutuvajokanuvudep.pdfIn PDF document text
    • http://sugizujesel.epizy.com/kemopekimefusorenofez.pdfIn PDF document text
    • http://pufupivati.epizy.com/27906106718.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/34100552612.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/indefinite_pronouns_worksheet_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/nenepaxim.pdfIn PDF document text
    • http://bosadubarelazu.rf.gd/allianz_sigorta_bes_iptal_formu.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_off0000db56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 5180 bytes
SHA-256: 8d749264c978825d79a72d0f8199dddef87317162be771b41497f0bd6385e75b
font_01_sfnt_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 10408 bytes
SHA-256: 1575e41b7be04d22cac8148d20372183c7ded4941a33cf1f936ab54793c65762

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