Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1afbf32fe1cf62…

MALICIOUS

PDF

76.7 KB Created: 2021-03-12 08:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b5ddf8bc572b6ab0b99a1ade766e6c95 SHA-1: 305e52f99284e94da97d2eded8e02c522a979a3e SHA-256: 3c1afbf32fe1cf62ddaea80351df96b3aaccd01cfd7a7e640eeafc85b1cf2bc3
126 Risk Score

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 0.9991

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://golowaki.ru/123?utm_term=atul+maheshwari+form+exam+date PDF link annotation
    • http://renavakurexiroz.22web.org/48336571212.pdfIn PDF document text
    • https://cdn.sqhk.co/wedegetuso/fijijbs/swimming_shark_phone_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/VNY20z2/hello_neighbor_act_3_walkthrough_playstation_4.pdfIn PDF document text
    • http://bemelegevew.22web.org/infosys_bpm_ltd_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/segisaxa/ihjfNif/piraladoxixojo.pdfIn PDF document text
    • http://pumeputokamodo.22web.org/bissell_cleanview_swivel_rewind_pet_brush_not_spinning.pdfIn PDF document text
    • http://ufenmac.com/mustang_fender_05-098a4pz.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulugere/cVjbLds/word_market_level_297.pdfIn PDF document text
    • http://copyrightproblem.com/french_english_dictionary_onlinezoxj6.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jcuiipp/rarejuginato.pdfIn PDF document text
    • http://lulumel.66ghz.com/bumisiberesowokugekew.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/hhajiy5/pusonoxibajewum.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/cheLxgi/green_the_planet_2_best_weapon_fusion.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/dtgdgeE/retawewuwob.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/ZjbjdmR/the_room_where_it_happened_analysis_hamilton.pdfIn PDF document text
    • http://world-wild-shop.com/audio_driver_windows_7_64_bit_lenovobabf0.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/hljaigU/7895121173.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/jdnhdha/wezenaw.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/ggQNdjh/dragon_lord_deck_yugioh.pdfIn PDF document text
    • http://politach.com/59950715319pauqg.pdfIn PDF document text
    • https://cdn.sqhk.co/kofosenolo/jcZchaE/2685583339.pdfIn PDF document text
    • http://christinaanddavid2019.com/just_two_words_puzzle_7653zo9p.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/JWDhcYP/yandex_browser_safe.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/dtbyhgt/fruits_basket_2020_english_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudotebu.epizy.com/xumobolopaxawixovemapog.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_off0000ed25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED25 5296 bytes
SHA-256: 4982f23ac82e88da111c0ac850d5c1e7e460b7b7dee42595c81934145e99c348
font_01_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 11220 bytes
SHA-256: eec5e8e7a62d1c3d2dc88e90bf34091073ccd91f1a96caaf93d47aef019e2e91

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