Malicious PDF — malware analysis report

Static analysis result for SHA-256 75268fe6bb263133…

MALICIOUS

PDF

74.2 KB Created: 2021-02-21 10:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a259114dd4d8deda86f79dae6bf32ad9 SHA-1: de020228ba226df643486662a1bf7b7ad5bf5f2a SHA-256: 75268fe6bb263133ac97bd781d7f12014a0d0d236da6b559a7395f3779ce9606
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are disguised as PDF documents, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=jcpenney+sewing+machine+model+6912+manual PDF link annotation
    • https://cdn.sqhk.co/sotatixorawi/hWheiii/x-_cannon_game_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/hjcSJTc/615_e_front_street_traverse_city_michigan_49686.pdfIn PDF document text
    • http://tibetterrier.ru/2009_porsche_cayenne_repair_manualuguit.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/28aYxgj/marvel_comics_subscription_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/dXxmn6e/2510118631.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/ajfLK97/hair_clippers_sound_effects_prank.pdfIn PDF document text
    • http://extraterrestrials.space/884030799558qylv.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/RCgg1hi/detective_conan_movie_22_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/ciimjfB/lotiganobitav.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/jae2uN7/knife_sharpening_steel_use.pdfIn PDF document text
    • https://jelakuge.weebly.com/uploads/1/3/1/8/131856802/zotoboxolu_madijexixeg_sixojusotix_dedozekena.pdfIn PDF document text
    • http://amst-watch-v2.club/sadebiuvrhb.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/fizup/bottines_plateforme_lacets_talon.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/42673375163.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/lamuxaxosexulesi.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/zovajobuxaf.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_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 6068 bytes
SHA-256: 8170e376b70f86db04acacf48050ffa83f29cb77be2a127870a584dc3ccc8a90
font_01_sfnt_off0000f877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 10480 bytes
SHA-256: 9acf85a32e395626c5ac1ed1f1164c063eb30312b19f8fad8a556dfeeba02b58

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