Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb40f448a0e514e…

MALICIOUS

PDF

77.9 KB Created: 2021-03-13 20:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 033f1ebe2f2454872ae658c313b03a34 SHA-1: 5ed96097577a1ada6a8bdf402bd6e28b34b12326 SHA-256: 6eb40f448a0e514ee12ed6138ae2f95c4f62e8147f42e5fff7bf9da1e91ec5ec
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links to various domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing or trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites. No scripts were extracted from this sample.

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://ponafet.ru/123?utm_term=android+studio+change+theme+to+dracula PDF link annotation
    • https://cdn.sqhk.co/netimupoxojo/8tdZhfO/28885223978.pdfIn PDF document text
    • https://dawudetunik.weebly.com/uploads/1/3/5/9/135972975/f7bd9de4fb3acf.pdfIn PDF document text
    • https://pabifiliponisod.weebly.com/uploads/1/3/4/3/134367040/kobudosutak_pejanox.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/ujdKihk/disney_customer_support_jobs.pdfIn PDF document text
    • http://vittorguxx.site/la_biblia_de_liderazgo_de_maxwellhzz7l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_6019b6c9a4892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_603c0017b3a96.pdfIn PDF document text
    • https://cdn.sqhk.co/fujigugi/jedgcgh/big_baby_meme_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/lukupupiba/haghBhe/pixel_puzzle_collection.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/33534370305tehsq.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/51ec5538dd127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_603532c2be5af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491725/normal_5ff872ffac8dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_15f6d591b09c4241ac735a37da8dabcc.pdf?index=trueIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_4574a7c45a724abab99bfcb26f1bb28b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/how_to_deal_with_being_miserable.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/whatsapp_video_calling_app_free_2016.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_36c29dc3ee7741e49907b5169f1e85c8.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_a4858db4bf0d42068f53ea3f12525a54.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 5224 bytes
SHA-256: 373205afbd641b3e490dc203b73ac2674d0808959f640328179a5137f467b7e7
font_01_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 11404 bytes
SHA-256: 3e4d4d9bda59b2cd90afcca4cce7819d979448c123398bd26751f4201e06bbfd
font_02_sfnt_off00011d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378