Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d2b08e8b746993…

MALICIOUS

PDF

79.3 KB Created: 2021-05-09 10:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d13fab628e8efdf5d6ab3c0b1a6ee8e SHA-1: b85a61ae5390cafa163b009969c6d95e6fa00914 SHA-256: 06d2b08e8b746993e023d86d949c6fe7d9932e39086e132a889ce110a9f8e9c7
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

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://resalured.ru/strik?utm_term=supply+chain+management+jobs+entry+level+salary PDF link annotation
    • http://callipakk2.site/distance_vs_time_graph_worksheet_answersct5sa.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/vivegamesudurugemomiri.pdfIn PDF document text
    • https://nonovobuzodeku.weebly.com/uploads/1/3/5/3/135348203/7910896.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/3kk0icM/taptap_heroes_best_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/nerurepaza/e0Uifqw/learn_spanish_language_online_courses_udemy.pdfIn PDF document text
    • http://yourlivehelp.com/panasonic_es8243a_manuals9tcp.pdfIn PDF document text
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/xalerakek.pdfIn PDF document text
    • https://cdn.sqhk.co/bebofuwe/B4gjhdr/lol_para_colorear.pdfIn PDF document text
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/ruzexeso.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/yVjeidG/66966385845.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/FgcrRhi/57170749879.pdfIn PDF document text
    • http://thesalle.xyz/bosukumosedoburolajinu4o52h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3dc8d0a-397f-4303-99a5-a7927e83d850.filesusr.com/ugd/e916cf_9dc7903243d64bd7b905429c32c543eb.pdf?index=trueIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_dc84f292de8f4668a5ed4c822cf65d78.pdf?index=trueIn PDF document text
    • http://gemawinikifiv.myartsonline.com/software_development_business_plan.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_6945822838e046aba3ab543fd7fba9ea.pdf?index=trueIn 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_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 5828 bytes
SHA-256: 8f39880a43f992931adc7e2216f43e8b612c31ee91c845e69d14e66f192e5135
font_01_sfnt_off00010d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 10136 bytes
SHA-256: a3f4027786edbd8c2f417bb47b4e613d56d85ff831efd96d21a6556721dfc4fb

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