Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89b1ef2162881d1…

MALICIOUS

PDF

77.1 KB Created: 2020-11-18 08:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a7f6fe3ab7a38745b5b8b4baeb795fe7 SHA-1: 3e3c030ca6e8e6cafb14fc6799a3c72d5ab62330 SHA-256: b89b1ef2162881d16b152afa28ceb462f9e3a5f30170a26549f5fc8987857033
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=bandhan+movie+songs In PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/dc75b9810eaa3c5.pdfIn PDF document text
    • https://pukaxixuzex.weebly.com/uploads/1/3/4/4/134492253/1539485.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/9415232.pdfIn PDF document text
    • https://guratebiliwabop.weebly.com/uploads/1/3/2/6/132682790/rodesoxil_gapefafa_bazikiloronu.pdfIn PDF document text
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/zoribeselasovinuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f948571c9822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_5fa45254857cb.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/jexisimoniwiwumiweg.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/ed49d6bfe74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f8d758c56775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5f97cbc13d89b.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/jikopot/gulavejev.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/frontier_cable_tv_guide_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e922c051-4079-43eb-a53b-0461b90e15c4/photo_album_names_for_facebook.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_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 5220 bytes
SHA-256: 3281e5ac1d60c5323733fbe4c6b3e5ccc54d0dff17567b305bc44a199cfce82e
font_01_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 11368 bytes
SHA-256: 835a03bb82e252911689dd2ced99858e78e6a8dfc6b950d614458fe0b605ec56

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