Malicious PDF — malware analysis report

Static analysis result for SHA-256 5482d9af22b0698d…

MALICIOUS

PDF

85.1 KB Created: 2021-05-11 23:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7515941728ea69636ba83da9b23b6197 SHA-1: 1a83f44be3bbb9c93ae0a82f580872da5e15626b SHA-256: 5482d9af22b0698d859ee42c5afc6343938e76691e3aefd29dba7183d92a007c
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 0.9992

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://dafemum.ru/strik?utm_term=scosche+loc2sl+line+out+converter+with+bass+control PDF link annotation
    • http://hookup750.website/hard_sat_reading_passages1s2b1.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/Uieegip/glitch_lab_walkthrough.pdfIn PDF document text
    • http://instapriz365.online/zulojeginiwurijuepj0.pdfIn PDF document text
    • http://doctora.club/190029061407lsez.pdfIn PDF document text
    • https://rozinefowo.weebly.com/uploads/1/3/4/5/134576391/wotudexovitawo.pdfIn PDF document text
    • http://help-copyrighteamservice.com/15000143985uhozv.pdfIn PDF document text
    • http://sysfix.ru/25154837688b2t7n.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/7772756.pdfIn PDF document text
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/jumimiz.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/Zjalp3u/miwubolafel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/begijufadi/48372991701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69fdc1c-dae2-4b69-808d-7c3ec1b546cb/gubovetinixenawunepureka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75af0d5b-08ea-4d56-a4d9-5162772feb20/gazewu.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/95362511502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4dce6a-9701-4b90-a340-fd2739b5d5c7/xafowobefabosumedasojedaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17494ac-d0a2-484e-b5d5-617f67d20ebf/don_juan_demarco.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/6322351838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a90b928c-2d5a-487b-bc55-5abe1676ad23/vabizozowadifapebobomafe.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/context_clues_worksheets_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f452d4-30ca-411f-ad0c-0f32d7bd9ed2/20580058123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f641555-6909-4fb7-920d-f225f6c526ea/sewoteduki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9100d0f-7297-4856-8c60-c784a3f09fe8/57817893400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ba1de6-04e8-46ff-b3e0-3a2e36166369/2005_cadillac_cts_transmission_repair_cost.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 5296 bytes
SHA-256: b6f899e860ee7eb93fd7574bb832ccb5226a2796c7b53a21557b389e59bc867b
font_01_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 10972 bytes
SHA-256: a919f7262efe2dc8f1d90ae71b460c28bdf6f6a0eecac40e015306a8d4de4fcb
font_02_sfnt_off00013838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13838 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f