Malicious PDF — malware analysis report

Static analysis result for SHA-256 a739fd9458c42dfc…

MALICIOUS

PDF

73.4 KB Created: 2021-02-26 20:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 68d5df3bef43b887050ee81a9762679f SHA-1: c9531252b061a8329ca06e0bdc573ddecdbb58bc SHA-256: a739fd9458c42dfcbaffe8998286d4d8329b0359188adbf5b6bd74998557a06d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=how+to+replace+drain+hose+on+frigidaire+dishwasher PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383567/normal_5fe5636253f9c.pdfIn PDF document text
    • http://thrivewebs.com/vuwiligerxzumy.pdfIn PDF document text
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/museb-zobataz.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/music_in_theory_and_practice_volume_1_10th_edition_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5ff4c400a06bd.pdfIn PDF document text
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/2230888.pdfIn PDF document text
    • https://ribarifi.weebly.com/uploads/1/3/4/2/134266405/riloxotem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_6011c7d7689ed.pdfIn PDF document text
    • http://trynon.xyz/73943460902by3fi.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/modizalozodife-sezanoduzu.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/b306dd31.pdfIn PDF document text
    • https://gadolelexuzited.weebly.com/uploads/1/3/4/4/134486477/128c61.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/dikobepibelun/what_is_breech_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/30301980631.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/mijefotamideto.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_off0000e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 5468 bytes
SHA-256: eae985008a4c229844094ae743fb29bc6244daf5f6b5d8ffc01655a876b5a25c
font_01_sfnt_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 10592 bytes
SHA-256: 2fa0348240ffb24dacc851b18acc6b9410b8917d45a2e23b16c23b578437d0c9