Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd2a93e0e300ac3…

MALICIOUS

PDF

83.7 KB Created: 2021-03-28 17:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 43551edd91a9b531d326f859b64c5ef6 SHA-1: 97984b745ad68f16c4aa34c4eceb6835c3b5562e SHA-256: edd2a93e0e300ac3c1eeb538436c23c93c15f46e00272a9cba825b75abe4a6cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://bologen.ru/123?utm_term=belote+card+game+free PDF link annotation
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/kuxomow_xulonur_levotaginobaz_xanatopaz.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/ZChco48/fibedagilen.pdfIn PDF document text
    • http://llloooodddd.space/ridabilabijuzqttoq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377391/normal_5ff8156e19d91.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/74860473080wd2ea.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/lawiluderebalujegeso.pdfIn PDF document text
    • https://domenadonasi.weebly.com/uploads/1/3/0/8/130874365/2462947.pdfIn PDF document text
    • http://trysalon.xyz/macromolecules_worksheet_biochemistry_8_answer_key7j76q.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/gcVZOih/gacha_life_characters_ideas.pdfIn PDF document text
    • http://shopwithsale.website/induction_and_deduction_worksheet3pfmw.pdfIn PDF document text
    • http://detonic-italy.website/81687431992u2pyg.pdfIn PDF document text
    • http://zahlungsservice-ch.site/spanish_phrase_bookppl8o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_602c71f00b23f.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/uge1ihn/50882578977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_60315af3667ae.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/zuvovoxigumuz/kickass_malayalam_movies_free_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/vocational_education.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/59719665436.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_off00010a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 5212 bytes
SHA-256: ed69bf47deef9685d0c146fdc14d2b5513adacf173f671de8da1a9905052ea82
font_01_sfnt_off00011c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1F 11004 bytes
SHA-256: 5307ee108ac0a863861ee1e4a37f51cbd4fd48e9ee4a1ac1443f61ef19e0ca8a