Malicious PDF — malware analysis report

Static analysis result for SHA-256 9148250404e69919…

MALICIOUS

PDF

75.8 KB Created: 2021-05-16 01:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3c4c17317316ff9ea8c3fcbdada8a9dc SHA-1: 4604570a4ed1e26f824777208e504fb6b7164851 SHA-256: 9148250404e69919d513992a824e2fa7ce9ef3c19f05d4d5f116c9d2107191ac
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 employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=how+to+tune+in+panasonic+tv PDF link annotation
    • https://cdn.sqhk.co/lasanamemego/P1jh3hc/rivuwem.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/c323f877904.pdfIn PDF document text
    • http://durowan.sportsontheweb.net/carl_jung_development_of_personality.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/gxRHJ1i/dog_bubbles_petsmart.pdfIn PDF document text
    • http://frut-tree.site/tegupopurjvw8.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/pepugonidarixujemutadoni.pdfIn PDF document text
    • https://jegetujo.weebly.com/uploads/1/3/5/3/135300600/wuribakoxixe.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/league_of_stickman_best_action_game_dreamsky5zsvm.pdfIn PDF document text
    • https://sedonefuwetupo.weebly.com/uploads/1/3/4/6/134669082/4faa0fe201680.pdfIn PDF document text
    • https://mawokuluser.weebly.com/uploads/1/3/5/3/135347786/7ff81.pdfIn PDF document text
    • http://startbastar.online/jefef9wvhz.pdfIn PDF document text
    • http://pochta-24.cc/chrome_terbaru_offline_64_bitu2lux.pdfIn PDF document text
    • https://tobuveforo.weebly.com/uploads/1/3/0/9/130969072/aa6b12f22686f.pdfIn PDF document text
    • http://potenciy.xyz/why_was_government_of_india_act_1935_introduced0n2j6.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/chdspgd/japanese_samurai_mask_chest_tattoo.pdfIn PDF document text
    • https://cdn.sqhk.co/kapudome/fum4Jgj/12156331281.pdfIn PDF document text
    • https://meliwulawobawis.weebly.com/uploads/1/3/5/2/135298556/bagetirituwaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b88214-fc6c-414d-ad9b-deec2d4b09ce/song_the_road_less_traveled.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/gumefufuzamazidojiruzonut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ea83ca-328b-4639-8435-1091eb91a203/design_of_reinforced_concrete_9th_edition_solution_manual_free.pdfIn PDF document text
    • http://kagijido.myartsonline.com/photoshop_cs5_crack_32_bit_download.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_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 4912 bytes
SHA-256: ae8b0d0b308aa1f9d4dc2e1ca0bb49ff48cb618ad73da0f2ce7e663285465ac8
font_01_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 11072 bytes
SHA-256: bd290324963e8661e6e9b3f33d7a586aa7095abe39b0b421b86ca4f08144c04c

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