Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02893a6e5f657ed…

MALICIOUS

PDF

105.4 KB Created: 2021-03-19 23:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4329bc56399ca056ab410c7244a48b39 SHA-1: 23a00dcde36c649c741beb4f88e6986fea6f8029 SHA-256: c02893a6e5f657edd5e6f86b203a5818937a50cc742af67b55ddf86d04ffb6e6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a trojanized payload. The presence of external URIs and the nature of the URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/123?utm_term=adobe+dc++for+windows+10 PDF link annotation
    • http://lnstagramverifiedsbadgesforms.com/2809601944wmoug.pdfIn PDF document text
    • http://kmplitka.shop/2005_honda_accord_maint_reqd_light_resetp6s7r.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/dabulowenizov6w2z3.pdfIn PDF document text
    • http://spencermcman.us/3609337774277ewh.pdfIn PDF document text
    • http://zuviwadakaji.22web.org/biochemistry_freeman_7th_edition.pdfIn PDF document text
    • http://trysoda.pro/how_to_write_a_critically_appraised_topic7ijpi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_60522cf681a69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fee48238c43e.pdfIn PDF document text
    • http://biotringel.shop/vidopupindtenf.pdfIn PDF document text
    • http://complect-tech.ru/354217196991wiu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5ff0dc8fed378.pdfIn PDF document text
    • http://helpcenter.business/jovewefatbt5kz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_6002b1c38fc36.pdfIn PDF document text
    • http://recepty-dd.info/how_to_do_a_roman_toga_costumeky9bv.pdfIn PDF document text
    • http://jilet2.club/bbc_pride_and_prejudice_free_streaminglzm93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luredavum.epizy.com/cbse_class_12_ncert_chemistry_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a09ad3e-1eb9-4be9-9fd3-a4ad2728537f/john_dewey_high_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3ccadf-5657-4a17-a5bb-d72a239911e4/is_kirby_clash_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/xiripefawujewapazasajoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e31ebc15-3079-4691-b270-6fe293476119/how_many_calories_in_a_dominos_medium_margherita_pizza.pdfIn PDF document text
    • http://janenukexozi.epizy.com/pafidani.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/the_telekinesis_training_method.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00015ed6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15ED6 31200 bytes
SHA-256: 67794e40352050a0d10cd91eb602a422a05671c8ab4abbf0deb5b04d1358771d
font_00_sfnt_off000127b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B5 5188 bytes
SHA-256: 484b485b4fc0b3826b852254b487514be83d9fdc16900fc36afe772849915a16
font_01_sfnt_off0001398a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398A 10852 bytes
SHA-256: a11e3af59259030b1b1b696fa672df0e48d92b5c041731ca0ad4a01442db0baa

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