Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11f7108d1216d34…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 21:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 419c9fd0fc62fb4f944772cf0d50b9f2 SHA-1: ed2135b5956a7d9cbb319c30b87e2ca69414c6a0 SHA-256: d11f7108d1216d346400c9f0db5a395d41d709ae5ddeb4bf873548f8ec48a9c3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm. The document body, though heavily obfuscated, suggests a catalogue lure, which is a common tactic for phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/123?utm_term=catalogue+marjane+2019+pdf PDF link annotation
    • https://cdn.sqhk.co/kizofapekeku/Rhjifjh/hdfc_diners_club_international_rewardz_credit_card_benefits.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/kJiid9s/fukaralexabuzipaken.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/geCgjge/14052568624.pdfIn PDF document text
    • https://cdn.sqhk.co/merisipugito/ejcidgd/37828698101.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/uhgoWif/studentvue_egusd_login.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/eGEiidl/27914239087.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/continuation_sheets_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/romafime/iNqiezw/antelope_canyon_get_your_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/eegfH8v/master_craft_new_crafting_game_ios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donake/lobelawufefikog.pdfIn PDF document text
    • http://badavusepewojo.epizy.com/violation_of_community_guidelines_meaning_in_tamil.pdfIn PDF document text
    • http://bituzemonupekot.epizy.com/cambio_climatico_global_causas_y_consecuencias.pdfIn PDF document text
    • http://kuzusegipo.rf.gd/united_express_carry_on_bag_size.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/good_night_kiss_image_free.pdfIn PDF document text
    • http://mapixuxiloko.epizy.com/what_is_a_symbol_in_stocks.pdfIn PDF document text
    • http://dimizisunope.epizy.com/boston_bruins_2020_schedule.pdfIn PDF document text
    • http://mujujum.epizy.com/lexerenirurake.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/vexuxu.pdfIn PDF document text
    • http://gagolugumetuvo.epizy.com/briggs_and_stratton_intek_206_carburetor_rebuild_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/69185296443.pdfIn PDF document text
    • http://susupufewowe.epizy.com/3288264755.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/marvel_future_fight_epic_quest_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 5648 bytes
SHA-256: 884c5b19de232d87e831b1b423a6385d5076f7a1abf0db6f2008f2814fba15ac
font_01_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 11628 bytes
SHA-256: e4f64ea31b5f854c46cdca2f9d4c049225fee9a92df49ab79e097d9eee3e3121
font_02_sfnt_off00011a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 19664 bytes
SHA-256: 59090879eff4f8d90863041d1ed1d5bb380323b6f9a30f8252fd825aa0dbc8a9

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