Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e844bb9d33a0530…

MALICIOUS

PDF

72.1 KB Created: 2021-06-05 03:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8045eae0c8f8c386cd6962cdef52d6c8 SHA-1: e19b644aaa561d6805414020386e4730876d1003 SHA-256: 5e844bb9d33a05303f57fb4d534f422be3e4029e24aacfc54fd3c97a0c5c2ff7
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

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://irlanc.ru/pbw?utm_term=camera+app+icon+missing+android PDF link annotation
    • https://nutumavu.weebly.com/uploads/1/3/5/4/135400781/nivotunor-koluvoporibemiz-regelatekilizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_60241b2ee2d09.pdfIn PDF document text
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/1074566.pdfIn PDF document text
    • https://mikutefax.weebly.com/uploads/1/3/4/8/134866710/7626032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_604834d8cdff7.pdfIn PDF document text
    • https://befofevaz.weebly.com/uploads/1/3/0/9/130969220/juves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_6032ceacad37c.pdfIn PDF document text
    • https://tifunubuxeji.weebly.com/uploads/1/3/4/5/134523212/4594581.pdfIn PDF document text
    • https://vewewiganivobob.weebly.com/uploads/1/3/4/8/134852084/duzuwu-baxaduf-mavegom.pdfIn PDF document text
    • https://rudozusaviso.weebly.com/uploads/1/3/4/0/134041113/doteg.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/9447565a-c6bf-44ae-85c7-a00c672f74d0/78366037819.pdfIn PDF document text
    • http://xofitesu.pbworks.com/w/file/fetch/144568404/lotopogowitopetidogaxeb.pdfIn PDF document text
    • http://taxoxuf.pbworks.com/f/26045023942.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144419373/tipibojirefifumazamade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be0a466-7f7d-45ad-9af3-738e8fc94d68/bibeboninas.pdfIn PDF document text
    • http://depowota.pbworks.com/w/file/fetch/144502452/xematamapatulunel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5871d612-97ed-4a31-9841-684432e6a2a0/how_can_you_tell_if_a_bird_likes_you.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/w/file/fetch/144562557/how_to_program_a_vivitar_remote.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/f/circuit_lectrique_lampe_interrupteur.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/51840892596.pdfIn PDF document text
    • https://forums.androidcentral.com/showthread.php?t=661292&s=b1bf4d1f5d51c5042853a269a28733e8In 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
    • https://forums.androidcentral.com/showthread.php?t=661292&s=b1bf4d1f5d51c5042853a269a28733e8In 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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 5264 bytes
SHA-256: 9a1059e7af2fb63ffbf40575adc72f0cd0b4495586e2bcbfe2284f8a4ba57f20
font_01_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 11056 bytes
SHA-256: b8a054f727c26206a1287a43712dc176f5906c6ca3af1e395af53cbbf059ad76