Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f73504dba326f8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 13:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0fe2e29cb61cf99faf33f6e54ae7bccd SHA-1: d35e224d1c71c7257d36b6724148ca75aeb73ec3 SHA-256: 56f73504dba326f81ca93a1152f7e1174aaf3be4892079c4eefbdeb8ba2b3a74
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, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=how+to+teach+present+simple+to+beginners PDF link annotation
    • http://vkysnaya-eda.site/88814366219nu424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379038/normal_5ff4984765b1f.pdfIn PDF document text
    • http://joblanc.xyz/charminar_movie_audio_songsbg1s6.pdfIn PDF document text
    • http://funusamemis.22web.org/shunt_motor_dc.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/lajarejezajolu.pdfIn PDF document text
    • http://premiumpornclips.com/apc_back-ups_es_750_flashing_red_battery_light66o06.pdfIn PDF document text
    • http://vatamuvemazaril.sportsontheweb.net/aquelarre_juego_de_rol.pdfIn PDF document text
    • https://reratuzofi.weebly.com/uploads/1/3/5/3/135346135/0d40eb4e3b6e.pdfIn PDF document text
    • http://wamuterireted.iblogger.org/taxol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_6016d91de1aed.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/danby_12_000_btu_3-in-1_portable_air_conditioner_reviewskaevy.pdfIn PDF document text
    • http://damita.fun/wodepif25e8w.pdfIn PDF document text
    • https://kajugolake.weebly.com/uploads/1/3/0/9/130969904/23b3c84514f3b.pdfIn PDF document text
    • https://rakulemuvi.weebly.com/uploads/1/3/4/5/134506415/dimaxapijine.pdfIn PDF document text
    • https://jiwujidevidu.weebly.com/uploads/1/3/0/8/130874067/wagukogileze.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/tenancy_agreement_form_in_nigeria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://figaniver.epizy.com/inter-_agency_standing_committee_iasc_gbv_guidelines.pdfIn PDF document text
    • http://nazedizabif.rf.gd/lagozalim.pdfIn PDF document text
    • http://najufijipavavot.rf.gd/pozoxokib.pdfIn PDF document text
    • http://vepisesilutez.epizy.com/synonyms_and_antonyms_for_ssc_exam.pdfIn PDF document text
    • http://wuzorijo.rf.gd/lumagudixideji.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/legusenurin.pdfIn PDF document text
    • http://bevikawefepo.epizy.com/63081457219.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_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 5540 bytes
SHA-256: 47bd193f78d6409d2d4e1ccfbf147a9bd77e85041117eaf9ea929d5e2ed366f2
font_01_sfnt_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 11064 bytes
SHA-256: 7cd827418049dc6a82d3eb7de9768c11e8ca705a4c011c02e3e980e58bfca23e

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