Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edb02d4eecf27c0…

MALICIOUS

PDF

98.3 KB Created: 2021-04-10 04:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fa82f49e70b42aeb86664112930e853c SHA-1: 216a6da4db4b26f5f966f3d3783c80163af0cd2f SHA-256: 5edb02d4eecf27c08b12355ef534815903c6808bcd9de6ea33ec17fba0cfa528
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 a large number of embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's primary purpose is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=why+is+my+ninja+blinking+red PDF link annotation
    • http://lomigakorak.getenjoyment.net/basic_networking_mcq_questions_and_answers.pdfIn PDF document text
    • http://micrometerdigital.xyz/2685344498540c7a.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/A2hLBjf/rush_tap_game.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/eibjhcD/jubanugami.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/hqyifgk/hero_x_zombies_hile_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/hbgjibR/farm_heroes_super_saga_not_loading_on_facebook.pdfIn PDF document text
    • http://pubggaming.online/autocad_2016_keygen_crack_free53tde.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/gd5gN0B/best_sellers_books_2020_thriller.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/ohaggAp/93099439304.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/fsjcRjj/car_wallpaper_hd_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/dgWjeif/96188216160.pdfIn PDF document text
    • http://selolatoxomida.22web.org/xavasuxasililewe.pdfIn PDF document text
    • https://cdn.sqhk.co/mujipumelebe/UBWBFic/gudebudunejifuna.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/k1idCjc/89884891149.pdfIn PDF document text
    • https://cdn.sqhk.co/xokipuxat/f5BgfA5/slices_pizza_menu_johannesburg.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/jjSDYhb/measles_disease_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/2HAiagh/hover_1_eclipse_hoverboard_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/LN9Cghd/3_dimensional_character_template.pdfIn PDF document text
    • http://vitrinachel.ru/how_to_solve_math_question_online9f4ab.pdfIn PDF document text
    • https://cdn.sqhk.co/fifunolew/gAWH5KE/bejadog.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/81208372848.pdfIn PDF document text
    • http://idealicait.site/5503115270ohevt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukejisagev.epizy.com/rugufavo.pdfIn PDF document text
    • http://zosunofurokor.rf.gd/95270363800.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/how_to_prepare_for_maths_interview.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_off00013ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC6 5636 bytes
SHA-256: b971abe11c3ec91ac2a068091b75ff5db3740e9ef577fb843b341feff0fbe4f6
font_01_sfnt_off000151d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D7 11796 bytes
SHA-256: a3d36efe0f121911485b9175bc96af14832186af8e9dc67df767c60c55609e56

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