Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9b932be4846bca…

MALICIOUS

PDF

111.4 KB Created: 2021-04-20 00:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 59f46b9d34a6da319db24e12fb5492c0 SHA-1: 2277729eef8e4da9ea19f808f7ce50a821af6414 SHA-256: 6a9b932be4846bcafa9d2cccd0e4eca6c3f680959224787467fc3f0d41b3511b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many unknown reputation URLs point to a phishing or credential harvesting attempt.

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://jottigo.ru/strik?utm_term=matlab+programming+techniques+pdf PDF link annotation
    • https://jofomozali.weebly.com/uploads/1/3/5/3/135387403/ziminigan.pdfIn PDF document text
    • http://vsspb.ru/difference_between_rule_based_and_principle_based_approaches_to_corporate_governance_regulationsvvm9l.pdfIn PDF document text
    • http://betmoy57.com/pedro_el_escamoso_capitulos_completoskfs45.pdfIn PDF document text
    • https://pofexetebi.weebly.com/uploads/1/3/4/5/134592759/700c886be4bac.pdfIn PDF document text
    • https://tulidakavixesa.weebly.com/uploads/1/3/5/3/135347336/6952035.pdfIn PDF document text
    • https://xutevuper.weebly.com/uploads/1/3/0/9/130969179/tivudixajotubavonuna.pdfIn PDF document text
    • http://lorem.space/vukikxacoq.pdfIn PDF document text
    • http://itabody.space/gokopesunogiwabet9uacx.pdfIn PDF document text
    • https://weritesi.weebly.com/uploads/1/3/5/3/135314652/verewugur.pdfIn PDF document text
    • http://brumbum6.xyz/jojo_part_7_anime_release_date_redditypo5c.pdfIn PDF document text
    • http://znatural.space/transmission_line_theory_bookssp2dj.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/e66f131d-de00-4f52-b91a-23adedf1c6b3/rewaxatifevuxuk.pdfIn PDF document text
    • http://pikuvideposem.epizy.com/gejizoxudi.pdfIn PDF document text
    • http://kupikobu.epizy.com/90768469597.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/61386679290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9d0590-da68-4490-9273-e64ac1e320cb/how_to_fix_a_jammed_pellet_stove_auger.pdfIn PDF document text
    • http://giguxorepego.epizy.com/teh_bunga_telang.pdfIn PDF document text
    • http://fedumizikel.epizy.com/10020394556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc956e4c-d945-446a-8572-fd8bdb6c5039/how_to_play_binary_options_trading.pdfIn PDF document text
    • http://davafegi.epizy.com/what_kind_of_juice_do_you_use_for_mimosas.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/misatiwupikidikogavobon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 51832 bytes
SHA-256: 727cf3253ebd2408f4b2387fa66277d04f3410dc19c30b60001bec4ea2a1e2b4
font_01_sfnt_off00017670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17670 5840 bytes
SHA-256: 5377421191657c00456528201defe545923dbc9e7f5df8bcd5e6db5af7deeca1
font_02_sfnt_off00018a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A24 10600 bytes
SHA-256: be961ab3addb516182ff75929cfc8305571f729d179c9d69f632f9a65563d1b3

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