Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0e07174f27a021…

MALICIOUS

PDF

78.0 KB Created: 2021-03-25 05:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9cc40def92dc9924068722d47b27a85c SHA-1: 27838412f5938a1e55f5ed0f061108f9bb67d8c3 SHA-256: 6c0e07174f27a021e2a7d902e3387c20ab32f92b582edda56ab0c080bb310ce7
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting an attempt to obscure the true malicious destination. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=basic+math+facts+practice+worksheet PDF link annotation
    • http://fubikopelemom.mypressonline.com/53422371573.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/tonadotufoga.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/gjk3zOx/60374455419.pdfIn PDF document text
    • http://vkrowl.com/ice_breakers_cinnamon_gum_nutrition_facts2u5xu.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/cpa_2020.pdfIn PDF document text
    • http://caterm.ru/skyrim_switch_guide_book4rfb7.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/kajirujufotisijadatewivom.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/bsjcjfN/codashop_free_fire_tournament.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/Xgj44hc/radio_italia_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hifgdKO/game_room_ideas_pinterest.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/hbuNijO/can_you_link_echo_dots_on_different_accounts.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/79119838487.pdfIn PDF document text
    • https://cdn.sqhk.co/xutijexop/icTgchc/aesthetic_backgrounds_iphone_6s.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/rubibib/char_broil_grill_performance_manual.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/10682097625.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tososite.onlinewebshop.net/wbssc_biology_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb9e905-6135-4d7e-b63e-a90533929b5a/samsung_aircon_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44835621-d492-458f-9ff7-94f623183c00/27474327648.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/47107555370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4586fc-c821-4141-9132-ee84aa769fc8/fender_mustang_v2_40w_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52c2213-f243-4a75-afb3-d49ad81ba618/bronica_etrsi_body.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/singer_touch_and_sew_bobbin_winder.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_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 5428 bytes
SHA-256: db7b022eacd6aa42c6442ec0409e0b3199f69732d160c13e0e26f3918da8a41c
font_01_sfnt_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 10748 bytes
SHA-256: 23adb76d1bcc7decb2575058147ccf61b587ef70beea9362c700b4299da33daa

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