Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b693e576427287…

MALICIOUS

PDF

85.4 KB Created: 2021-03-24 05:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b21c38f2d030550e9d634420696e6b80 SHA-1: 117f1d49bffbf51a70ae5a45e6a9394586086a50 SHA-256: c6b693e576427287918cf107f197633c13cd729eeacb76e998c7f19ab169489f
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites under the guise of providing search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to facilitate the redirection to potentially harmful URLs.

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/award?keyword=church+administrative+assistant+interview+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/xaranoraf/cE8PX0i/38105244015.pdfIn PDF document text
    • https://mokakabatedi.weebly.com/uploads/1/3/5/3/135300589/zinasupewitaxib-kixukavugeluzop-rasixeduloviwez.pdfIn PDF document text
    • https://jabifuvos.weebly.com/uploads/1/3/1/0/131070291/88baf8f4dae.pdfIn PDF document text
    • https://suwitasejamuk.weebly.com/uploads/1/3/1/8/131856391/849cd319b56abd.pdfIn PDF document text
    • https://cdn.sqhk.co/daribugubive/hTjghge/vosufusonidobidida.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/avjjbjh/significado_de_buzzer.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/NkEjcR1/35021668500.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/cJcxRhb/poxazexikajidiv.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/WibLgi7/driving_cartoon_video.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/ihhgUig/bus_simulator_original_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/jZphhLR/22594213056.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/jdbe7ic/pabanebujizizigerur.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/i638heX/army_battle_simulator_mod_apk.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/rerinago/27252774857.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_45002f77799e4e11aa3e4075be64ae20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/biwoziw.pdfIn PDF document text
    • http://tawuzosidekelos.epizy.com/lanaruketaxigezo.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_4f24c5cfcd574536afa911adf4db3dc8.pdf?index=trueIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_74e984c88aa048ee91d9d55410dc4845.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/kibofopakifubo.pdfIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_930e7b29bf8e4bcca010f710a998dbb0.pdf?index=trueIn PDF document text
    • http://jalugegaru.epizy.com/fashion_report_ffxiv_guide.pdfIn PDF document text
    • http://weragugu.rf.gd/math_key_words.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_a83f2796ff70443cbcbd801934ba6c37.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_off00011183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 5544 bytes
SHA-256: c4895f993a066cf586b73f3a1a80208e40dbffa6589f0e58a9634a9d62a3f622
font_01_sfnt_off00012442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12442 10680 bytes
SHA-256: d9caa877f0a526b6491cbf4a3b7a0d27929f453f1f5aefc1926594049335f939