Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4eb0d598778228…

MALICIOUS

PDF

88.4 KB Created: 2021-02-26 06:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1ebc8da836eb45a098c61a00678bcc02 SHA-1: daa24e40bd3de17e4c2e76211c9ed2003626c5d9 SHA-256: 6d4eb0d598778228e318d87afbba11e875e635f5fef3dc840fd737604b2d4da1
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body contains obfuscated text and embedded links, suggesting an attempt to trick users into visiting potentially harmful websites. The presence of numerous links on disposable hosting further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=the+girl+with+the+dragon+tattoo+series+book+6 In PDF document text
    • http://wivaserana.mywebcommunity.org/vobujetumowenazewakewabuw.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/canon_mg3520_printer_cl_light.pdfIn PDF document text
    • http://numulul.mygamesonline.org/18975243222.pdfIn PDF document text
    • http://alex-chekalev.com/book_review_born_a_crime_trevor_noah2swyu.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/eaeb68.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/98566332167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/vowasigijeruzugegeparado.pdfIn PDF document text
    • http://benipibidi.rf.gd/13124756635.pdfIn PDF document text
    • http://lamafuravufezin.epizy.com/blubber_glove_experiment_worksheet.pdfIn PDF document text
    • http://memapekoge.epizy.com/wokatuxifetobewivimur.pdfIn PDF document text
    • http://wagesasalep.rf.gd/duxerodet.pdfIn PDF document text
    • http://vumafovixono.rf.gd/free_printable_hymn_sheet_music_for_piano.pdfIn PDF document text
    • http://fifaleniw.epizy.com/59924295980.pdfIn PDF document text
    • http://javasuk.epizy.com/racing_car_game_please.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_off00011ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC2 5484 bytes
SHA-256: 58ea36843d27868c410c09bdd0801b82f8f4aaf40d2fbcc82f6d2f8b603ac34e
font_01_sfnt_off00012d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 11656 bytes
SHA-256: 47a727fef0e3d184dae0828e8d54866afe275c678725d74e09a90eafea16e2ce