Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad51c1dd99a39b6b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-22 09:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 243e436f7adec753fa3ae38f3b070979 SHA-1: 0e8df0fdae55f651987de2b7a131e2028d586ac3 SHA-256: ad51c1dd99a39b6b3125cefaf4fce3d450b25fe74dcec8426cf47bafbbc933a3
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on 'https://jumiwimov.ru/wix?keyword=veeam+mp+installation+guide'. This URL, combined with the heuristic flagging it as a link farm on disposable hosting, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to the embedded links.

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://jumiwimov.ru/wix?keyword=veeam+mp+installation+guide PDF link annotation
    • http://bovakepixoworax.iblogger.org/what_is_wrong_with_my_dyson_hoover.pdfIn PDF document text
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/japipetug-xixisanevunop-jijebadesazizaf-naloranofetakeb.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/mivamirofozarubewasike.pdfIn PDF document text
    • http://werewov.22web.org/descargar_libro_de_significado_de_los_sueos_gratis.pdfIn PDF document text
    • http://dovulup.iblogger.org/lumefofa.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/gomuluzojiner.pdfIn PDF document text
    • http://midebozizigod.iblogger.org/fluke_battery_tester.pdfIn PDF document text
    • https://tonuwuro.weebly.com/uploads/1/3/0/7/130739505/2970972.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizufapu/71204242471.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_b05a0ace8018407d94872fb4f12c7e4d.pdf?index=trueIn PDF document text
    • http://vanepozimor.rf.gd/60531687273.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_b5ca505e8e424512ac107c3ef9003484.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_c6339ea6d3c84e91911a90f6607eee3e.pdf?index=trueIn PDF document text
    • http://lamisegowa.epizy.com/english_grammar_test_a2.pdfIn PDF document text
    • http://jawedujap.rf.gd/lufagigevusegodewej.pdfIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_bd44489a8b664a8898ba724b199b3465.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_1149c92cb48443488e6d6ae0c6d22a73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/98318232117.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_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 5148 bytes
SHA-256: 69edfa2474c5255e6ebc6afb686c8d58d6298b5ef0f0c8f2b8a5b2fd5d262274
font_01_sfnt_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 10832 bytes
SHA-256: 304b4807d97ab4d231d38772aa0c3b2038280db8a25aaedd0a897d640239ca0c

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