Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d9b389056afca5…

MALICIOUS

PDF

86.6 KB Created: 2021-04-14 02:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 974c9860717a61d70110242d55a68424 SHA-1: 9d6c75c87a5ddd4faa75d2bdb1ab6a2d80885853 SHA-256: 74d9b389056afca5bc74edaa8fee3522736847c378ea6b1ca487f3ac4d59e482
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and one prominent URL that appears to be part of a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/strik?utm_term=how+to+install+a+ceiling+fan+without+the+downrod PDF link annotation
    • http://toportt.online/51829041268tv6md.pdfIn PDF document text
    • http://nirenodeba.medianewsonline.com/43438631237.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/ahegeJS/samsung_split_ac_remote_online.pdfIn PDF document text
    • http://natur-bio.space/traguese_ese_sapo_audiolibroe1h0h.pdfIn PDF document text
    • http://hidver.com/32920422670uvxou.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/whats_the_fastest_way_to_learn_korean.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/Wgdnnjj/popuruwobefijepizamoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pexoroxijaseduj.rf.gd/body_beast_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/what_celebrity_has_bell_palsy.pdfIn PDF document text
    • http://laxufazekez.atwebpages.com/9174603240.pdfIn PDF document text
    • http://zemagarekerak.epizy.com/academic_essay_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/sunbeam_electric_blanket_queen_target.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_f5669835e894479da1298759a2d92cc4.pdf?index=trueIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_9d84a37a917b4dee95a6ded5372b19b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/xutopo.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_fcd148b990da4cfdaf1a240e2bfa45e6.pdf?index=trueIn PDF document text
    • http://tixinova.rf.gd/la_fitness_cancellation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/arizona_state_football_uniform_schedule.pdfIn PDF document text
    • http://rovatidakenaj.rf.gd/history_alive_textbook_6th_grade.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/72446938834.pdfIn PDF document text
    • http://sukijikulo.epizy.com/black_and_decker_16_inch_electric_hedge_trimmer.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_1adbd57c1a4a4a968fa927925d18172f.pdf?index=trueIn 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_off0001157e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157E 5336 bytes
SHA-256: be431f99bece5ea138c0b52be2901866ba6f2767fb0bf18b907c5fac018eeddb
font_01_sfnt_off000127ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 10752 bytes
SHA-256: 2158bae2a8ddc0ec37a49537e2ba4a13be6f13888b8ed05d9fb331834c8e8f3f

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