Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3e7e79bb7fca0b…

MALICIOUS

PDF

86.1 KB Created: 2021-03-22 06:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b7aac3465a50e911f63252ef9e9e4174 SHA-1: 0ec86c37c3476c8b95c15619864f8fdcf5dcefb0 SHA-256: 7f3e7e79bb7fca0bbb3701180250e22aaf7990559b326e17e864432c21b2f1b9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=jerry+garcia+band+tabs PDF link annotation
    • http://bandalet.club/90307561413wcptx.pdfIn PDF document text
    • http://cashfree.store/cowboy_chicken_restaurant_near_me8wuoo.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/giUwfX2/books_to_read_for_business_management_degree.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/9eUjiig/naia_national_championship_football_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_5fca7ff66b748.pdfIn PDF document text
    • http://ru-en.xyz/outlook_2013_free_filehippofnmft.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/abnormal_psychology_barlow_8th_edition_free.pdfIn PDF document text
    • http://zebolalifitu.22web.org/41843498796.pdfIn PDF document text
    • http://bonetanoli.22web.org/kenmore_oasis_washer_not_draining.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/VeMjjjb/koala_bear_by_ugg_slippers.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/bootstrap_basic_template_free2xj6s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_600369bc90fdf.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/QhbFNeu/demon_slayer_rpg_2_how_to_get_breathing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakapenabu.atwebpages.com/cannibals_and_kings_marvin_harris.pdfIn PDF document text
    • http://pewubik.atwebpages.com/38935773142.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/54200658302.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/what_is_the_air_fuel_ratio_for_diesel_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/woh_pehli_baar_full_song.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/conducting_marketing_research_and_forecasting_demand.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/rawiferulara.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_off00011051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11051 5308 bytes
SHA-256: 91655656f7d1c6ce3560c6adf73d80f5c2aec2d75e48153752a6cf4585855ca7
font_01_sfnt_off0001226e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 12684 bytes
SHA-256: 34dfa2e43c483ab8d21d32e0b24e62c0d3b0e06c2f36175c361a8b6a050b01bc

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