Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d269f49a3bc2e8b…

MALICIOUS

PDF

71.2 KB Created: 2021-04-03 06:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06a6c0ea31fae206fe2a47c83b44a8d9 SHA-1: b8140fef5381e7f9f980e30d4d582c2d32bf11a6 SHA-256: 3d269f49a3bc2e8b30c0143aa31321c28f135df2799fadcfee9ce091a9cbca26
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external links pointing to disposable hosting services. This is a common technique used to distribute malware or conduct phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/puzevajimobuz.pdf In PDF document text
    • https://zomusabizexeko.weebly.com/uploads/1/3/4/3/134317177/tulogixaxifebol.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/dixubese-pipeb.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/libiguwamasawisoja.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/2191982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_60150c139cd27.pdfIn PDF document text
    • https://wumasokur.weebly.com/uploads/1/3/1/3/131384536/watafidolanedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_6026ee707f378.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/3110758.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/d3787b12a0d8b1.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/jufebewaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fe612f101ff8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/B9wesDdUo4k/wb?keyword=thomas%20calculus%2012th%20edition%20solution%20chapter%207PDF link annotation
    • https://uploads.strikinglycdn.com/files/a524e0fe-d804-4bb7-9163-a402a4c01223/como_crear_un_archivo_en_desde_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a68c416-0b4c-4b43-b673-8350615335f2/gufozomapojiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0390da-0823-45e6-b298-207fe812a9f7/computer_systems_institute_tuition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8729aa66-41dd-4a77-b7c2-eb40878b762f/what_can_be_programmed_with_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f889c5-8b82-4ce2-8413-f098cefb593d/how_much_do_alaskan_citizens_get_paid_for_oil.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_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 5528 bytes
SHA-256: 629098d13637040c49d60df4d604e0062daca860856ddec25b7e947189c1a676
font_01_sfnt_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 11500 bytes
SHA-256: 0d24ed3b9a87a85aa7d7cb15bceead8da4d166dfd8fc7707efc450fa9ff49d1a

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