Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca175f88cdd9290…

MALICIOUS

PDF

76.0 KB Created: 2021-02-07 05:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 03aa6dd6c267a614e095b71493e37d27 SHA-1: 615c43cdf5f91681b26a51b923c2cfa369ed8dc0 SHA-256: aca175f88cdd9290e0687a8d93339277680f44afaad431e1752a873066b7a5be
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many hosted on disposable domains or link-shortening services, suggesting an attempt to distribute traffic or obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to SEO spam or phishing lures.

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://maypoin.ru/wb?keyword=aashiqui%202%20movie%20%20isaimini PDF link annotation
    • https://cdn.sqhk.co/busanurutar/RHiekIf/19442390838.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/HggBqii/30518959234.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/kuwupebul.pdfIn PDF document text
    • https://bixirugabo.weebly.com/uploads/1/3/0/9/130969405/risivanusit_zomix_bibilat_buduf.pdfIn PDF document text
    • http://dunizajo.66ghz.com/cisco_academy_chapter_7_test_answers.pdfIn PDF document text
    • http://zolewuren.22web.org/nizefedewebav.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/PUWjiif/mediamonkey_skins_installieren.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/hibsQwi/pixel_unicorn_color_by_number.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/Bhchdif/6821209140.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/5050401.pdfIn PDF document text
    • https://lataladegizozav.weebly.com/uploads/1/3/4/6/134685495/bipebon-bazavuja-dajowedowumureg-ruwifuramesopaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/SAgcjiP/playstation_video_app_samsung_tv.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/potekazu.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/8712e080a2a.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/gcibhyc/87699006024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tedonipevafipe.epizy.com/13388473602.pdfIn PDF document text
    • http://mexokibalu.epizy.com/top_system_administrator_interview_questions_and_answers.pdfIn PDF document text
    • http://biligisagazo.epizy.com/lavof.pdfIn PDF document text
    • http://tinyurl.com/m7zulwdIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 5104 bytes
SHA-256: 5535f88c095f91a3c960341c12235dcdd5486cedbe1c37104fdd5278b1edab02
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 11380 bytes
SHA-256: 5a00322229ead3c9e631155d4261874fd65c2a14e4ca4e9c6d87a3ca0faefe55

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