Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde9d27da41514aa…

MALICIOUS

PDF

79.2 KB Created: 2021-04-06 16:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1132215b1fe2fa0a05b4ca225f54bac2 SHA-1: 6443236423657ba08a0d9a4d8288897be460060d SHA-256: bde9d27da41514aaabf1ff52e95ac06213fed5519e7aa27020db1bec8ab3bb8f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary suspicious URL pointing to 'vilenefex.ru'. The document body, though partially garbled, suggests a lure related to a popular Netflix show to entice clicks. The presence of a PDF link farm heuristic and ClamAV detection further supports a malicious classification, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=cuando+se+estrena+cien+a%25C3%25B1os+de+soledad+en+netflix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457586/normal_60468d7dd29fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5fc892d82fa4d.pdfIn PDF document text
    • http://amin-ukraine.net/pedaxavisugasi2zq7.pdfIn PDF document text
    • http://instapriz.website/texorinajuzezevlt2t.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/7346809.pdfIn PDF document text
    • https://fupebabo.weebly.com/uploads/1/3/4/6/134601971/xutobubewamexorej.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/zomuzukokuzixekixapi.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/6504731.pdfIn PDF document text
    • http://enots.space/zorerasidexamitidot2g7zw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_5fd798ed1ab95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5fd083840ee9e.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/b0cbd96.pdfIn PDF document text
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/xabowarapuziran.pdfIn PDF document text
    • http://adv-workshop.site/raksha_bandhan_song_video_2018c5flh.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/runitu_satagefidujamo_kofetaduverojev.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_6000d00eee573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wemazun/40520555352.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/2007_jayco_expanda_owners_manual.pdfIn PDF document text
    • https://71bfc0c6-4bef-405a-aee6-9e9dcaab3d12.filesusr.com/ugd/708cfd_661811ba17ff4f92b549f5b6e020085e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/73486280709.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_570403da63364ae8abd6947c3345ad7b.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_51449ce6e0444d3eac9fcaa125645993.pdf?index=trueIn PDF document text
    • https://4228e3e8-6e56-436b-9c2a-5710a6c3a216.filesusr.com/ugd/e32dc8_0e18ce3242194b75b6812fd9535bcc0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropi/22954051105.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/46603199189.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_feb5905018ae4fd48fd50f6dd44a2848.pdf?index=trueIn 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_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 5200 bytes
SHA-256: 21bf05b2954aa9c6458a3a40a3dd23d30adadd576b3dfa54c31cf823d4bc8a75
font_01_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 12212 bytes
SHA-256: 7b548445225ce190300e0642945219e88333a6c730b9f7f8554d3a8eebdc17ec

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