Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbaf4e372fe61ee…

MALICIOUS

PDF

70.8 KB Created: 2021-02-25 21:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e0fdb584f5d98bb09490364320a5e6d3 SHA-1: 2b6c029951c40b17c2445b25edb5e10b6619a9b4 SHA-256: 2dbaf4e372fe61ee4c04b502482a462c688dd1651f1c7cca5721ec6ef619fd99
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple external URIs, including a link farm on disposable hosting, suggests the document is designed to redirect users to malicious sites. The 'urgency lure' heuristic further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/award?keyword=how+to+finalize+a+dvd+toshiba+recorder PDF link annotation
    • http://suzamajotibe.mywebcommunity.org/merakafomim.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/4057312.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/is_waterpik_water_flosser_good.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/dibs_in_search_of_self_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gigdjbe/kanelaliwu.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/vtjfggV/prediction_fantasy_premier_league_gameweek_4.pdfIn PDF document text
    • https://vinunawamezod.weebly.com/uploads/1/3/1/3/131380031/02eccad.pdfIn PDF document text
    • http://olymptrade.buzz/transformers_prime_operation_bumblebee_part_1fyquz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruxunuweni.epizy.com/accounting_terms_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/89966854980.pdfIn PDF document text
    • http://jiporiri.rf.gd/92469956295.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/93334531602.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/31310896662.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_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 5412 bytes
SHA-256: cc4f1390e191fd090fd4c1e7f4bc0e13173840d4c9b266f28f33bb80884ea75e
font_01_sfnt_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 10696 bytes
SHA-256: 9e6faaf0e91037942aa97d464a6ef9a8f42ea79aba3cbcf107d5d0b8a976f085

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