Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1d02b7bc680b24…

MALICIOUS

PDF

74.3 KB Created: 2021-01-20 04:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e92d794e150ca959ee22b2c195dd9d71 SHA-1: 9a9ca5a40cc1f196fd82735a9276661b6c50e90d SHA-256: 9f1d02b7bc680b24cfb7da9690e721a187f68cd7e863b6016e12296612570b47
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 0.9992

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://trafficel.ru/123?utm_term=el+verbo+ser+free+worksheet PDF link annotation
    • https://cdn.sqhk.co/lebereme/idpEROP/beast_boy_shub_horror_games_granny_2.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/GcjjheP/74049251228.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/idyiiiz/my_life_events_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/r8cha7h/71500417128.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/djc4T6q/chest_freezer_near_me_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/waderapal/iiidt42/pearl_art_store_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/eZvgchl/zara_black_friday_2020_romania.pdfIn PDF document text
    • https://cdn.sqhk.co/jarutejip/GBCXUhf/troll_face_quest_video_games_2_level_15.pdfIn PDF document text
    • http://wedejopejujotu.iblogger.org/basara_2_heroes_dolphin_emulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5f968977aef6a.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jbHzLtR/nhl_21_xbox_one_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/jife2SC/fake_nails_done_at_home_bargains.pdfIn PDF document text
    • https://site-1190334.mozfiles.com/files/1190334/46215384487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5fc186493f45b.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/2ijbyok/8852077931.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/jb1tile/monkey_mania_bankstown_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/tudakesovif/R5L6fhb/stokke_tripp_trapp_tray_natural.pdfIn PDF document text
    • https://site-1167955.mozfiles.com/files/1167955/glitter_wallpaper_for_laptop.pdfIn PDF document text
    • https://site-1183516.mozfiles.com/files/1183516/wolfquest_3_anniversary_edition_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f91c77a58b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5fa2e1810d7b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevamixebigal.epizy.com/26512040049.pdfIn PDF document text
    • http://kefixofelapadi.epizy.com/excuse_letter_format_for_work.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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 4956 bytes
SHA-256: 7b971921a4f1a2eed765dcdb0c65cc2425a13269818f2e5975233acdf676583f
font_01_sfnt_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 11308 bytes
SHA-256: 9849e982c86e9504948515d8256e584376442f03ee1fbef53069050c78c2a55b