Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e77b5aa08bbc07…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 18:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 86af23dde21978e31987da98c0821af2 SHA-1: 73b399d70d30ea016cd408c72467028bde5680f1 SHA-256: 78e77b5aa08bbc073328a6632b4ae692ff8700624b507db3f6146ed8b748e1a6
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to distribute malware. The presence of 'utm_term' in one URL and the document body referencing '2004 dodge ram owners manual pdf' indicates a lure to trick users into downloading a malicious file disguised as a manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=2004+dodge+ram+owners+manual+pdf PDF link annotation
    • http://fukuzowi.sportsontheweb.net/mapagu.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/1496386553.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/think_and_grow_rich_ebook_kindle.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/allen_carr_quit_smoking_free_download.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/jasasa.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/27548232988.pdfIn PDF document text
    • http://xumavedam.22web.org/occurrence_report_meaning_in_english.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/peace_like_a_river_chords_paul_simon.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/jolejajud.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/fuxekege.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/dipivixudekoziriderejinum.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/accenture_accounts_interview_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/d-link_dir-890l_ac3200_router.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/63210739696.pdfIn PDF document text
    • http://jokosen.atwebpages.com/92686781109.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/64727914285.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/poposeboza.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/dabodebuligona.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/nojafoxikukofivafoxapu.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_do_you_calculate_energy_efficiency_ratio.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_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5720 bytes
SHA-256: bcf6f7894234235fabec954ea3183b33bc0c1a5b118daf7986ffd7ae5ef857a8
font_01_sfnt_off0000fa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 10200 bytes
SHA-256: 25cf25fca4ff79b80bf66085f319eef9c003ee584042e06a281f55f3ee6a413a

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