Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbb2adfad960098…

MALICIOUS

PDF

75.4 KB Created: 2021-02-28 04:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f89e759114026f09ff859c1ab6c1ef16 SHA-1: edfbbb6b4c63fc1a5e00840d528e48259d845a50 SHA-256: 2cbb2adfad9600981bda16447a598196e609a6d781a2c74ffb1b70fe267d91f2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm configuration, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious 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 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://xezojetit.ru/aws?utm_term=love+application+for+girlfriend+in+hindi+shayri PDF link annotation
    • http://uorott.com/nubelibaxixigajufabowatlr03.pdfIn PDF document text
    • http://freshmind.net/1850529534111tx7.pdfIn PDF document text
    • http://imedo.ru/stokes_equation_weak_formw19dh.pdfIn PDF document text
    • http://frankiearvelo.com/dark_souls_1_wiki_boss_weapons_rankedu7r3i.pdfIn PDF document text
    • http://reestr.site/600259592i0rz2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fcf272418808.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/guitar_rock_and_roll_songs07z55.pdfIn PDF document text
    • http://organize.shop/4289120553806s36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_600a4e8d1269b.pdfIn PDF document text
    • http://interstart.online/bowflex_m5_fitness_testdobtf.pdfIn PDF document text
    • http://yourbigdick.space/chaumont_hardware_fishing_reportjqkzs.pdfIn PDF document text
    • http://pristav.pro/13893465135jqy57.pdfIn PDF document text
    • http://dwatches.site/92558692662ff12c.pdfIn PDF document text
    • http://tegor.xyz/embryology_evolution_worksheetm6mey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_6008fcd6cadb1.pdfIn PDF document text
    • http://petrol-v-pol-price.site/nombres_y_ttulos_de_jess_en_el_antiguo_testamento101vn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_60241ab3245ad.pdfIn PDF document text
    • http://viewcreditscore.info/837844821743rhpd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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_off0000db4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 5520 bytes
SHA-256: 4983fc9e8fe03b98d14147c9b400f9c4bdab8b4cbe704003f4bd54dd894b830f
font_01_sfnt_off0000ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1C 9736 bytes
SHA-256: 371cc760e057b87965d8e470400e7ee2f9851599aab79ee1b363196b96fe6e9e
font_02_sfnt_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 3768 bytes
SHA-256: 303884b7fe9258df36ec63c48aaee6084ae3842e16915a192ab8bad65d6b6b87

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