Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d5e242e3356aa7…

MALICIOUS

PDF

90.2 KB Created: 2021-03-14 03:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: ba97d429c87afdfcaa8f17c24bad644a SHA-1: 53f77f6750add3b862b6de22b0107e727af96251 SHA-256: 17d5e242e3356aa731fecd05d57a0bff81099ad1088ba504f13283309d31432d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm designed to redirect users, likely to a phishing or malware site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://xajibur.ru/wix?keyword=blue+howlite+ring PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493550/normal_5fe9dc8c1ab99.pdfIn PDF document text
    • http://prizinsta24.site/51487834539dzb5d.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/wjbhehh/78183168914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fcfe5820b619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_6012cc07da077.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/hehjDgd/gakowafiledixefexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_601406bae6301.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/aRugdia/super_clone_game_apk_mod.pdfIn PDF document text
    • http://buybritishcat.com/baby_magic_bullet_target_australiahk9hb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_600539da05e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/dutumutu/DghCNhc/zukelikubuza.pdfIn PDF document text
    • http://xolidila.iblogger.org/classification_of_plants_and_animals_study_guide.pdfIn PDF document text
    • http://app-3null.com/63078912206971bi.pdfIn PDF document text
    • https://cdn.sqhk.co/rowavarop/Dhagehh/word_collect_answers_level_200.pdfIn PDF document text
    • http://vimebadu.22web.org/blest_machine.pdfIn PDF document text
    • http://pafewubeb.iblogger.org/61011853210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6298a109-285f-4da8-9094-d2aa3bdbbce0/segagumu.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/education_scotland_recent_reports.pdfIn PDF document text
    • http://zipodanej.rf.gd/41495422492.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/19484728653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b3b546-8d5f-4b63-aab6-3f2f18a80f34/5695261046.pdfIn PDF document text
    • http://kagabefusexem.epizy.com/nice_guidelines_intermittent_pneumatic_compression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a33f63-3eb7-474a-8c1a-72ffd8b37595/how_to_hard_reset_iphone_5s_without_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/kinds_of_sentences_according_to_function_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/tasak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f086822f-e93f-42c5-905b-bcfb5deece93/95283069666.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_off0001241c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241C 4700 bytes
SHA-256: ddd78280b444f599d47fc930137165e36bef0e15ab391af3412bf1dd9521b11f
font_01_sfnt_off00013427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13427 11396 bytes
SHA-256: 643b65b261c43d6607845b46c0fbbf4af5bf26f36f3820495e2bc84488fb0800

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