Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fc9324ad3b3f2b…

MALICIOUS

PDF

86.8 KB Created: 2021-04-18 06:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8df1f01142c73518e66ab652d182669f SHA-1: 17b9737992e529f5617183a7dfb7c7680c4e37aa SHA-256: e4fc9324ad3b3f2b3120600c789854772507c1023b2ad9537c96972be1dd22c7
186 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. 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 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://dugedepap.ru/strik?utm_term=why+is+my+singer+sewing+machine+jamming PDF link annotation
    • https://vedagoxa.weebly.com/uploads/1/3/4/4/134498973/905775.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/animal_farm_george_orwell_characters9fgeb.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/hjggcih/among_us_character_costume_real_life.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/chfgjKk/bingo_team_building_exercise.pdfIn PDF document text
    • https://fixefukazadutux.weebly.com/uploads/1/3/1/6/131607703/4956e4.pdfIn PDF document text
    • http://mmmuuuue.space/gilotth64c.pdfIn PDF document text
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/gumazowole_vumusoz.pdfIn PDF document text
    • https://nopirepogoduk.weebly.com/uploads/1/3/4/0/134095858/abec21598d73.pdfIn PDF document text
    • http://edevletorg.com/how_update_tomtom_maps_for_freefrk6u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_600bfad610cfa.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/aiiy5hj/gifonejinak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_606dca3e94802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454432/normal_6000d6657a73d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_6054864895c52.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/571646.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/5058650.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/pHiao2v/64447182444.pdfIn PDF document text
    • https://xugepofu.weebly.com/uploads/1/3/1/3/131383580/dfd271c168d2.pdfIn PDF document text
    • https://bubebozozuj.weebly.com/uploads/1/3/1/8/131871643/9716217.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/iY0gejg/vukogubibepidugogatu.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/pukuxi-sodizunefuwi-rurawokofuf-gojimadebafoxi.pdfIn PDF document text
    • http://profoto22.ru/297452263203hv94.pdfIn PDF document text
    • http://noverst.xyz/69196864258c8v7p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rezumasalimod.epizy.com/63709913247.pdfIn PDF document text
    • http://govilike.epizy.com/15940214117.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_off000114e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E8 5464 bytes
SHA-256: 8e595ea25e952ab1912d9bce8c19b1a8dd7b01581bcd2d1885831ff43c2e6d72
font_01_sfnt_off00012777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12777 10796 bytes
SHA-256: bfafcfdd896f7900132fdf4537e95da713759472a5d39048dbfd181101a48228