Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5ca9d62eaefd19…

MALICIOUS

PDF

75.8 KB Created: 2021-05-16 12:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dab8670c354981819880e68e94023e13 SHA-1: de88817b0c23cd6a3a5d6f887c77d6aa3e58a236 SHA-256: 1c5ca9d62eaefd19afc1a6b68d2f48019bacf9fdacce89ae7ef8156434a79339
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'jumiwimov.ru' which is associated with a phishing lure related to 'Five Nights at Freddy's' characters. The presence of multiple disposable hosting links further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/strik?utm_term=five+nights+at+freddy%2527s+characters+sister+location
    • https://cdn-cms.f-static.net/uploads/4368218/normal_60138718878a2.pdf
    • https://cdn-cms.f-static.net/uploads/4388611/normal_60548161e58a8.pdf
    • https://cdn.sqhk.co/baruduwege/bwheVig/adjustable_stainless_steel_cake_slicer_leveler_mousse_ring.pdf
    • https://cdn.sqhk.co/zamokaxu/bijYdQ4/how_can_i_download_telegram_chat_history.pdf
    • https://cdn.sqhk.co/pofoxubo/h0rmpSt/csulb_international_business_major_requirements.pdf
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcb381fbd553.pdf
    • https://cdn.sqhk.co/sitopizol/Pfhchh9/restaurants_near_doubletree_hilton_burlington_vt.pdf
    • http://ninuxalezopo.getenjoyment.net/international_business_final_exam_questions_and_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4414866/normal_60282c7ed6c64.pdf
    • http://xukigebek.iblogger.org/someone_anyone_nobody_somebody_anybody_nobody_exercises.pdf
    • https://cdn.sqhk.co/gixelotopa/Cgi6Tgf/mafopikenapedofabigimit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jurizamumi.myartsonline.com/16436858853.pdf
    • https://3f054cde-0430-4828-89d0-5f77035cf230.filesusr.com/ugd/d93890_78d6d181e56d4154aeee23dbff880f21.pdf?index=true
    • http://vipenugixegun.epizy.com/aluminium_alloys_composition.pdf
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_4c0d1bac6abd4985bfdcb3c326d5dd05.pdf?index=true
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_458cdfcfd63c41ecb84bc8d67b30731b.pdf?index=true
    • https://s3.amazonaws.com/kegovev/wanidejabuluroduwevimupi.pdf
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_d645446e91b3469199f2a5e1a8ad752d.pdf?index=true
    • http://mutejoluwoluzib.rf.gd/temperament_and_atypical_behavior_scale.pdf
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_7bc983484e6f4add8b73c162c7601190.pdf?index=true
    • https://s3.amazonaws.com/dovulavavo/botw_a_fragmented_monument_guide.pdf
    • http://volitutaga.rf.gd/best_computer_awareness_book.pdf
    • https://s3.amazonaws.com/pazerogasarinu/poruwoledutapegugegufedo.pdf
    • http://zalatikewal.atwebpages.com/bsc_1st_year_botany_books_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbdb.bin
84beba7d934b016e0d0a54d1128b82eef3b67fb3f28b5f4e6b9fefaf19be5bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 5224 bytes
font_01_sfnt_off0000eda8.bin
7e605bfc17ed111aed02d89b2a7a9beac02468834adb2152f0025355734cade3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 10912 bytes
font_02_sfnt_off00011313.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11313 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.