Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6aba349a2c5681…

MALICIOUS

PDF

80.2 KB Created: 2021-03-24 17:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 61e6716c50a7e200e0286a1813fc2bc8 SHA-1: 52b048a942c459777e62992fd1fd211c78106894 SHA-256: fe6aba349a2c5681a6882ed035242de13155abd37a7cec4743530de27778949e
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9950

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://midufefew.ru/strik?utm_term=t+maxx+2.5+transmission+problems PDF link annotation
    • http://tadugebakonuged.getenjoyment.net/nokugodedinesironak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457604/normal_6021ed5b4ff44.pdfIn PDF document text
    • https://tasiwusod.weebly.com/uploads/1/3/5/3/135351817/cb1d2a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473322/normal_5fe27867ee538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601de9b620156.pdfIn PDF document text
    • https://sararilaba.weebly.com/uploads/1/3/1/4/131482808/255467.pdfIn PDF document text
    • https://bakurisevujukuj.weebly.com/uploads/1/3/4/3/134368754/renosa-nikelis-saxixanapunizeg.pdfIn PDF document text
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/f53ea1f21fce1f.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/zarisivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5ffd994e0c162.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/dyson_dc25_parts_diagram.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/388974.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/wenis-fixinurexatinu-vamapama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_601a643f19c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_602b361dd7065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_60357c487d427.pdfIn PDF document text
    • http://subejewumo.scienceontheweb.net/tibegikovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502511/normal_5fd23bffd5821.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/96658f32aafcce.pdfIn PDF document text
    • https://ludakugoru.weebly.com/uploads/1/3/4/6/134698973/7405831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_602a885d7965a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ffe0921cfeea.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/zasuguwafof.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/861868cb-bbd4-4a64-b79f-539e5a1c822f/defavonajogagulisigovexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf30ad3-5ed6-431e-bb97-07733560c548/whirlpool_duet_steam_washer_and_dryer_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a99478-13ec-4c3b-ab54-b22ed2eeda92/92120777049.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/chicco_bravo_stroller_folding_instructions.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_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 5196 bytes
SHA-256: 225c5b809f2ca3d5fc892282daffb5363bf0d66f685be7eb890065fcd8eaf816
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10624 bytes
SHA-256: f19e4e7832a691ffa5892a75e636aede7014314495647bc472b32da2ac0d09af
font_02_sfnt_off00012399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333