Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36c49fb99997531…

MALICIOUS

PDF

77.4 KB Created: 2021-03-05 00:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c8fa3588445f6210455fbc29cf280378 SHA-1: 1a9f01c66eca3569f61763ab15955a136cb4abc7 SHA-256: c36c49fb99997531487ccbd62d565b0ebc63bc0714a823702d66d32f9cf43fbc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malware or conduct phishing. The presence of external URIs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/strik?utm_term=power+wheels+dune+racer+green+walmart PDF link annotation
    • http://midikakuvekume.mywebcommunity.org/susawajilazimaditeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5fdfc17f84e33.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/he59hck/ice_cream_maker_cuisinart_ice_30bc.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/how_can_i_get_into_my_acer_laptop_if_i_forgot_the_password.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/ijMifgj/pavosuzerozaxibobi.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/links_awakening_switch_review_gamespot.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/j0BjdsW/digi_sport_2_hd_romania_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_6003d15129921.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/iQlEC1V/mp3_player_app_no_ads.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/para_que_nos_sirve_el_fluor_en_nuestro_cuerpo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_6005fd93a9205.pdfIn PDF document text
    • http://fezanabuxa.22web.org/beat_maker_go_pro_apk_free.pdfIn PDF document text
    • http://disetikala.22web.org/25413039248.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/autocad_lt_2019_computer_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_6012fa545b5ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevejonitu.onlinewebshop.net/how_to_connect_dishwasher_drain_hose_to_air_gap.pdfIn PDF document text
    • http://luzigipo.epizy.com/what_device_is_used_to_measure_arterial_blood_pressure_from_the_brachial_artery.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/rufavul.pdfIn PDF document text
    • http://lorabedujeweb.epizy.com/58455540251.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/nec_dt300_phone_conference_call.pdfIn PDF document text
    • http://bideliv.rf.gd/sri_rudram_lyrics_in_tamil_with_meaning.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/baal_veer_returns_1st_episode.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_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 5448 bytes
SHA-256: d0172f25ee3f7460e32767704ba61f5a5467948886d83981774edfec181411d4
font_01_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 10892 bytes
SHA-256: 9ab1f9ab9f51fc61a8020c30f79de9a2d8def2ace166d3dbe1248358eaa8a922

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