Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dd194f503f3f2d…

MALICIOUS

PDF

84.1 KB Created: 2021-03-17 21:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1d6035ef686abe4044ddac94bbefeadb SHA-1: 26c1581dc9e2136c68fac5033f965cf05aa0c7f5 SHA-256: f8dd194f503f3f2d73c18aea49c2f935a36538745b62da6f848d0e643642701c
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting, and one prominent URL that appears to be part of a phishing lure for a Samsung product. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the embedded links. No scripts were extracted, but the PDF structure itself is indicative of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=samsung+galaxy+note+30+ultra+price+in+nigeria PDF link annotation
    • https://filudatobo.weebly.com/uploads/1/3/2/6/132681654/galogarobeveji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457014/normal_5fe44af4b9b93.pdfIn PDF document text
    • https://rizizisexulap.weebly.com/uploads/1/3/1/4/131407181/1bd0620caf52006.pdfIn PDF document text
    • https://guvusogom.weebly.com/uploads/1/3/5/3/135324715/pigoruvonixeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_6049af662e599.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/lemobo.pdfIn PDF document text
    • https://renalulawe.weebly.com/uploads/1/3/4/7/134735886/zatobisisetezedavavu.pdfIn PDF document text
    • http://xogosedo.iblogger.org/slope_of_a_line_formula.pdfIn PDF document text
    • https://nenatuver.weebly.com/uploads/1/3/4/0/134017756/dupojixojitej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_5fe81e5664c22.pdfIn PDF document text
    • http://lazirawolewok.getenjoyment.net/prince_lionheart_premium_wipe_warmer_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewuwuja.onlinewebshop.net/woxunolosisadenegewep.pdfIn PDF document text
    • http://zubutavobidu.rf.gd/ice_cream_cone_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/79247024905.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/rituzemoledo.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/23224537647.pdfIn PDF document text
    • http://vowefaxi.epizy.com/barium_sulfate_msds_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d2b851-62be-4354-8440-2a67e009c806/cateye_mity_8_instructions.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/30118089701.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/98568185121.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/sentry_call_blocker_ct-cid808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6d0759-335a-4462-97f8-58d23b42a89c/how_do_i_become_an_appliance_repair_technician.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_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 5832 bytes
SHA-256: 23460e6e434c991166dc9a70f6462ee0c645835938522e4c8143add769e101b0
font_01_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 11336 bytes
SHA-256: 2dc463cb57cd77dc0aef50c1a910d4ae3e0a451248044ce6601b38a47e24b204

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