Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ce128f29f848cb…

MALICIOUS

PDF

72.5 KB Created: 2021-02-24 00:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 29614e96bb3bf825da42c1df59e4e964 SHA-1: df9df41e03cf842da6bc0552a9ef140f3f8843b4 SHA-256: 75ce128f29f848cb8a61bf613a084beba118fc28cfbbb1e29785df70b674d86a
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains multiple external URIs, including one pointing to 'baarspo.ru', suggesting it is used to lure users to malicious sites. The PDF structure and embedded content are indicative of a phishing or malware delivery mechanism.

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
  • 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://baarspo.ru/strik?utm_term=undead+white+dragon+5e PDF link annotation
    • http://sizijevoji.iblogger.org/quarter_half_past_time_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/hjJgc13/hide_and_seek_2019_cast.pdfIn PDF document text
    • http://veloxezidirexob.iblogger.org/campfire_songs_girl_guides.pdfIn PDF document text
    • http://wapazezaduv.iblogger.org/wave_interference_worksheet_20._3_key.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/yhekSih/45910613578.pdfIn PDF document text
    • https://cdn.sqhk.co/mumepefofise/id0ZMNp/vejozebudoretusalosamisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vixabediwudofi.epizy.com/68959609212.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/93494234502.pdfIn PDF document text
    • http://xawukagolu.epizy.com/free_printable_piano_sheet_music_with_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/let_you_go_lyrics.pdfIn PDF document text
    • http://femejedad.epizy.com/14865633878.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/animal_crossing_pocket_camp_villagers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/23797034133.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/xujugizemudisamulijo.pdfIn PDF document text
    • http://muwiliwus.epizy.com/liveable_neighbourhoods_best_practice_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/14051785492.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/fajagesifuki.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_off0000deb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 5084 bytes
SHA-256: 0440e1541c5a511e12e74cfa825c0992e1bbe41dfc09c8112f3af0c626102ff0
font_01_sfnt_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 10752 bytes
SHA-256: 5bfc509f6fc62e8e9c0f73fd90d86639c65140e8bf9ecaeb598f6bc62a04b577

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