Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef449c7dd274496…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 15:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 901279ff46d5c6eb40a5b0602745a5c3 SHA-1: 7fca381682633e50d1690b1220a04523196d0674 SHA-256: 2ef449c7dd274496a430aab8e8cd93d0bccbbe4fcceeae2a1db71152d035b81f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were extracted, the structure and URL patterns suggest it's designed to lure users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://seumenha.ru/wix?keyword=sea+turtle+characteristics PDF link annotation
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/sofexiwedixebok.pdfIn PDF document text
    • https://jikegasabum.weebly.com/uploads/1/3/1/8/131856907/4661401.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/CfVPMjf/rrb_alp_cut_off_marks_2014.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/what_are_the_main_causes_and_effects_of_climate_change.pdfIn PDF document text
    • https://xabanovodo.weebly.com/uploads/1/3/0/7/130739860/tidararan_gigun.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/1878224643.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/breath_of_fire_2_strategy_guide.pdfIn PDF document text
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/8683401.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/hR7ihfd/muxajebijalogojira.pdfIn PDF document text
    • http://botefin.medianewsonline.com/50777906976.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/qhjhCja/salosovebomizezuboxinel.pdfIn PDF document text
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/siroxuzatilu-nufenu.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/depixopen_juzadogusej_rimexomateb_gudevejuwus.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/pics_annex_15.pdfIn PDF document text
    • https://cdn.sqhk.co/madozozafi/gjauggO/son_chiraiya_song_ringtone_free.pdfIn PDF document text
    • http://kejurudoji.medianewsonline.com/61816301650.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/cambridge_primary_english_learner_s_book_stage_1.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/6rjbTih/d_day_june_6th_1944_movie.pdfIn PDF document text
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/6013709.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/enderton_mathematical_logic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merapenerabari.myartsonline.com/redix.pdfIn PDF document text
    • http://napamewa.atwebpages.com/bible_new_testament_books_list.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_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 4992 bytes
SHA-256: 7bb6e688fd98b714edcb92f4c02d05c34e467375a6f9ff8bf8810336151dd49a
font_01_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 10264 bytes
SHA-256: e5a5937a53748d3023e03750b85f55f06b14e67991447acfd765d3c9d4de2d17

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