Malicious PDF — malware analysis report

Static analysis result for SHA-256 494dac085964ad3b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 23:38:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 375c2ef17a41c95bc62e6fb7756427f2 SHA-1: d94ca1596e68dc83d1cb37edb910cd5088f02c39 SHA-256: 494dac085964ad3b45a2d44a216727e27977f7e0c60551f6b1976160aa64f9fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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/wix?keyword=sharp+objects+pdf+vk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499317/normal_5ff1dfbe53530.pdfIn PDF document text
    • http://naturalm.space/20315291209d4u73.pdfIn PDF document text
    • http://probmake12.xyz/tukaduziwuwiwobefoteprgqr.pdfIn PDF document text
    • https://nefadojajekewa.weebly.com/uploads/1/3/0/8/130874163/saxijanadatarin.pdfIn PDF document text
    • http://biweekamnf.com/12210320446t7npq.pdfIn PDF document text
    • http://policyhelpcenter.com/wiat_ii_standard_score_descriptorsqibl8.pdfIn PDF document text
    • http://fullstacket.online/71206303172mfml6.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/fibuvitopagrebq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_6027f560035ab.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/action_plan_templatergoi8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5ffd4b31a760f.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/apostila_aula_de_violao.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/terudagozorujefu.pdfIn PDF document text
    • https://fuwivofopotafuj.weebly.com/uploads/1/3/5/3/135388640/0546300.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/lumanifitobajatayqwuo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489411/normal_60160bbb64d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_600ab14b79144.pdfIn PDF document text
    • http://iminn.ru/941834370456fu05.pdfIn PDF document text
    • http://ukranews.site/64238498309r6nst.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2455a08f-84e8-46fc-beea-a46b0a1c84e8/lukuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1463dc-4ceb-4e2a-b35a-9bce3e449c6b/have_yourself_a_merry_little_christmas_judy_garland_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705bf50f-738f-4661-b2b6-5b468acc3201/johnny_cash_feat._u2-_the_wanderer_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe54b7f-f23d-4b9a-a887-ba3a997f0b3d/30537266571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed29777b-a0dd-454a-bf2d-1dcf87102678/73894039208.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_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 5656 bytes
SHA-256: 7a174a59471a74ac31f3078a0a59068b2f0f3bc1454481b0c6a3b8245b3fc0d7
font_01_sfnt_off00010002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 16212 bytes
SHA-256: da5fa7800cd7192bb5086b1c2dce2e87c7ac6ff3105d857dc698a0b205ac5c47