Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f528f66e1638e7…

MALICIOUS

PDF

68.4 KB Created: 2020-12-14 01:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 43f9eb22f3665388960f2107b9e297f2 SHA-1: 2a6b501e93d5ca55313c6b2cb91bff1e7500d394 SHA-256: d6f528f66e1638e726184e657456115ebb5cbd5343fa583e149666b0e17941f6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing sites or download further malware.

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://traffset.ru/aws?utm_term=durga+amritvani+audio+free PDF link annotation
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/7fd07fc698.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/4511454.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/fuvitawiribakazufuk.pdfIn PDF document text
    • https://xukabasal.weebly.com/uploads/1/3/0/7/130776322/tiwok_rawawunomep_gigabugi.pdfIn PDF document text
    • https://bobenetawif.weebly.com/uploads/1/3/4/6/134666578/somukovuxolib_ligobipogemovaj_kulunibaf_lotawojumudiju.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/ravevutokik_xawasunud_zisavetoximose.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://uploads.strikinglycdn.com/files/0bc81aa9-9b53-4228-aec2-19dec1230ef6/7880872898.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc7ee1564cad75cc6cf3ec5/1606938133644/18056175646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b45491-7b55-4a7f-b5ee-735755d7db79/woverejesapudi.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/pedezexasumuponobopexuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1449fd0b-e167-4a37-bc41-48238e9110e7/showgirl_1995_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/tobuzagusotakekudipipoxav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc10d60a97599144e1c86ab/1606487393099/taruzowawatogez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16D 4960 bytes
SHA-256: 0f0cd595426af203547612d95f0e46d46858781b0e7e44d3a352a72325b7ca46
font_01_sfnt_off0000d241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD241 10848 bytes
SHA-256: d3fc2fb9f1097450f35e1fe8a8d6006f5f647a3b193fed031dc753c8e59e0703
font_02_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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