Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdbd0a50fa366a1…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 04:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 77c61a58cb36224ae496d0e3e743e5c7 SHA-1: eae55e411043e0bd84e0adc3d3096f9c20d16d16 SHA-256: 1cdbd0a50fa366a168861d6e02688f65c8c4658e6e7832be67b5ce19b59d394c
186 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
  • 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/award?keyword=can+i+share+someone+else%2527s+facebook+post PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416930/normal_601a9c10c08a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_601067ff8fc9d.pdfIn PDF document text
    • https://wuzituvivewug.weebly.com/uploads/1/3/5/3/135306668/f15c1.pdfIn PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/nopiwitevimij_wubisorakumot.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/iajdjgr/world_multi_craft_exploration_survival.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/ZqT8DJy/gepotijexuzisinija.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/sivejusefep.pdfIn PDF document text
    • https://dowusasetitemej.weebly.com/uploads/1/3/4/3/134307927/2210328.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/judigojuxixizis.pdfIn PDF document text
    • https://fazugiwe.weebly.com/uploads/1/3/4/0/134012697/3c92947b.pdfIn PDF document text
    • https://gezalimod.weebly.com/uploads/1/3/1/3/131379194/1683858.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/satedafadusizo/hvac_preventive_maintenance_checklist_template.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/8341083213.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/gilokoxuxutawe.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/vawawikiso.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_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 5396 bytes
SHA-256: 4d8e5ebd6aa616ccf0741bfcd3fc0d15414a840db62cbc5e335992bbeec23c43
font_01_sfnt_off0000f871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 10592 bytes
SHA-256: 85f62d86be1998d4bc1e6699c610f5f0f543704a646bc924d394c0a16ff3dd35