Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32f5773ed9a0d1e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-02 20:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a2403e9543c8e098a6fa9070291aa400 SHA-1: 41131ac81886ba23fc4fc45b49ae49be664e3e63 SHA-256: c32f5773ed9a0d1e23a455422583440923c6ced4d58fb4cafb33b1392c2e005a
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate an attempt to redirect the user to potentially harmful websites.

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://mezovuduw.ru/award?keyword=hp+elitebook+6930p+screen+price+in+nigeria PDF link annotation
    • https://negipefit.weebly.com/uploads/1/3/6/0/136054485/99a5fbb1d6022.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/23774378750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_6014207fc84df.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/2006_sea_doo_speedster_200_owners_manual.pdfIn PDF document text
    • http://vugezaselefobop.iblogger.org/vizibitujobusulegoki.pdfIn PDF document text
    • https://fezivalolir.weebly.com/uploads/1/3/4/4/134461714/9018884.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/9586666.pdfIn PDF document text
    • https://rulovuwupe.weebly.com/uploads/1/3/5/3/135386045/4588727.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/8914510.pdfIn PDF document text
    • https://joripipebepif.weebly.com/uploads/1/3/4/1/134131856/puwalem-bimuvured-topofutivakag-xonevazi.pdfIn PDF document text
    • https://puviguwa.weebly.com/uploads/1/3/0/7/130776677/wojudif.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/vunibotemudir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469850/normal_6034a10cb4365.pdfIn PDF document text
    • https://womolikusewafok.weebly.com/uploads/1/3/0/9/130969044/dejolukupeso-teligobazopiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_5fe8151dae53f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesafemumibow.myartsonline.com/sun_joe_spx3000_will_not_turn_on.pdfIn PDF document text
    • http://zasagugidi.epizy.com/65329260739.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_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 5880 bytes
SHA-256: 230507995eadafa1d3b9b5f12ff814ccac6f776788eb4d8159d081f1ea6b46e0
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 13000 bytes
SHA-256: 0970d911f9b68904451c8451c2b0c4a2e09dc95603efdcc63d87bb0b746d091d

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