Malicious PDF — malware analysis report

Static analysis result for SHA-256 abadf7cb925bac69…

MALICIOUS

PDF

115.5 KB Created: 2021-04-28 08:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ad4c6b7f4aa73bf0dfee046cb95ace57 SHA-1: a8c74033266f40990a05e188e14c7f31adc7e68b SHA-256: abadf7cb925bac699217e2fad0e15bba9ca838608981d85790c2238e406868ca
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the link farm structure point towards an attempt to trick users into visiting potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=shark+navigator+dlx+vs+dyson PDF link annotation
    • http://tejidirexe.mywebcommunity.org/59152573169.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/9409903.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/junedalamojaxin_kaxovodawide_jumigenidexiju_rilikuzaxa.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/celebrity_definition.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/syllogism_in_reasoning.pdfIn PDF document text
    • http://bandalet.club/sistema_endocrino_y_sus_partes_en_ingleszoe5x.pdfIn PDF document text
    • http://usacreditcheck.info/975099527970if6a.pdfIn PDF document text
    • https://jibigevemur.weebly.com/uploads/1/3/0/8/130873945/mufogowisutid.pdfIn PDF document text
    • http://buytoday.cc/acute_appendicitis_in_pregnancypk5n9.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/xusavuduzeluf.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/2a42fc28-c544-443a-980e-2e9bc4e0704d/military_food_service_recipe_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17155151-3c8f-4f77-84ae-1a8ce2ba4329/kodinofutumaranubaxofagek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad42a126-4f59-486c-ad36-1bd54b968b01/how_long_does_nest_doorbell_battery_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98490e5-634a-4f89-ab8b-5ec43487dd2b/xosudigonituw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11a9e44-6f3a-4b79-9d14-bde097f8f9e5/best_leather_holster_for_glock_19_gen_5.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/whatsapp_animated_gif_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/vapilofejoxuravolamazosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad5380c-9a40-421a-a62e-da44ac0b4c69/17938112228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315d1272-363b-48cd-b65f-2ec62f558b0a/buxojajuzuterudovanowo.pdfIn PDF document text
    • http://bidajalej.onlinewebshop.net/difewamelozaforagigodej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f0b404-2227-4b79-a117-00ac61c87389/79799612146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77688eca-328a-4f4a-974d-b3b2ab44ad59/starcraft_2_terran_units_strengths_and_weaknesses.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_off000184cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184CB 5484 bytes
SHA-256: 0fc309e9eec0892c4c1da36786435b561877f0e51011e2f22c76a9da0825ef93
font_01_sfnt_off00019775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19775 12452 bytes
SHA-256: 03d791bbd91cd40f011c14afca369f00c9c0057fb51defce7b8c4dca252aac6e