Malicious PDF — malware analysis report

Static analysis result for SHA-256 d265affb633d30ce…

MALICIOUS

PDF

74.9 KB Created: 2021-05-29 03:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d44ea8a53743775983e0f332d8dd40a9 SHA-1: 2b7b79a53b582d194bc85a4c4b6320087c927a46 SHA-256: d265affb633d30ce6e3ee80cc20e32d77bd8c700d8b43e0e7071f38d9b6f2db9
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it contains a link farm with numerous external URLs pointing to disposable hosting services, suggesting a phishing or SEO manipulation scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=elan+en+francais PDF link annotation
    • https://nemanuvipiza.weebly.com/uploads/1/3/1/3/131398236/falafowawawubu_lubiminalapot_bepul_xezom.pdfIn PDF document text
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/zazududini.pdfIn PDF document text
    • https://rimidewazasi.weebly.com/uploads/1/3/4/3/134317879/a5d55aa46.pdfIn PDF document text
    • https://malekijewa.weebly.com/uploads/1/3/0/8/130813883/1509773.pdfIn PDF document text
    • https://gakexuguzadeza.weebly.com/uploads/1/3/4/4/134401700/xebixalopoz_fuwefit.pdfIn PDF document text
    • https://giwafadewixagi.weebly.com/uploads/1/3/4/3/134369241/xuzajiz.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/ditaga.pdfIn PDF document text
    • https://sorajofuwomukiz.weebly.com/uploads/1/3/1/4/131407138/zozadovi-fejebupute-zobarekazo.pdfIn PDF document text
    • https://sejomuxajifaged.weebly.com/uploads/1/3/1/4/131437693/nefizevibedeped.pdfIn PDF document text
    • https://tafujopebipa.weebly.com/uploads/1/3/0/7/130774972/samuta-dibamexose-xaxowoxonulapuz-valuk.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/zejumonobuxeb.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/xagodelomasuliw.pdfIn PDF document text
    • https://fisabovetusita.weebly.com/uploads/1/3/4/5/134597566/wakizawo-velib-xokekawujez-nilotixagijuka.pdfIn PDF document text
    • https://lusugola.weebly.com/uploads/1/3/4/5/134599647/47140e878c312.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/c7cd453f-867f-4a1e-bc3b-ccff395c924a/potapadalaripawuwejux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8f6cf8-1b80-477a-8a54-4f3d505ef98c/wigasekevir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a47e06-0e59-474a-abc3-8ebede934ade/katogugoraloxowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea0ea95-3d20-43e2-a764-d12feef81507/naxerigofobapavelam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a17ffb2-22d3-4580-b658-069922d42c7a/kigajetizetadepetefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8515575e-9bbc-4fa6-84dc-02b7484689fb/what_does_orpheus_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f73963a-2f14-4a24-9be6-f077658524f6/htc_one_m8_screen_replacement.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_off0000e569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 4832 bytes
SHA-256: 1e9f70a39ea476015ae64eb0ff8e69c8bc88bc58012ba00deb46a5aab62689cb
font_01_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 12332 bytes
SHA-256: e53b0d409eccefc2430456f449f3c82e5efc2730d64742dea365709f14a1042d