Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa95586045e2bec…

MALICIOUS

PDF

103.8 KB Created: 2021-04-04 12:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76c948328e18b6aaf1a5008fa0afc615 SHA-1: d7304a5a0da17cabf6661002f518882beb6b4c42 SHA-256: dfa95586045e2bec9b240d2996260f6576197319825630b0a92cc1bbe8bbc759
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

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://ponafet.ru/strik?utm_term=list+female+saint+names
    • https://cdn.sqhk.co/dudosugebo/p3vTpgc/jolofamitumazafipe.pdf
    • http://zipubezexupoka.mywebcommunity.org/how_to_change_battery_on_jbl_flip_3.pdf
    • https://cdn.sqhk.co/doxowite/Yjcigja/roxaxisuvinumupoka.pdf
    • http://pe50off.pro/how_do_i_reset_netflix_on_my_panasonic_tvhe2al.pdf
    • https://cdn.sqhk.co/dafisuwikib/dV2HewD/7285750834.pdf
    • http://nurigoluda.mygamesonline.org/last_6_month_current_affairs_in_english.pdf
    • http://mynasert.online/7765876678udlhq.pdf
    • https://cdn.sqhk.co/sarokuneti/jb7KhjS/dream_home_board_game_app.pdf
    • http://danoguvu.medianewsonline.com/74525288812.pdf
    • http://dejivuxa.mygamesonline.org/42996474688.pdf
    • http://fevinoreniwelik.sportsontheweb.net/towopexowutenukegopikije.pdf
    • https://cdn.sqhk.co/faxixuwako/id1by4r/46751403947.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_dca649ecf44848b199b7dd4672ef099e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cf35e57e-5ffd-484b-a2a4-1a47f5c18cda/precauciones_de_la_administracion_de_medicamentos_por_via_intravenosa.pdf
    • https://uploads.strikinglycdn.com/files/8d638bac-fc32-4f20-b301-1b38382735c5/does_ddp_yoga_actually_work.pdf
    • http://lejiletuvasipib.onlinewebshop.net/pokemon_movie_2000_the_power_of_one_full_movie_in_hindi.pdf
    • http://zozupajekuledus.myartsonline.com/experiencing_the_lifespan_janet_belsky.pdf
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_2c887114ebc9469198f1d55e773851e4.pdf?index=true
    • http://jisunopesaluzi.atwebpages.com/30285874237.pdf
    • https://uploads.strikinglycdn.com/files/531688e4-1b7a-4ba5-bf93-d3dcab674f65/37553039514.pdf
    • http://mugomodag.atwebpages.com/9541258516.pdf
    • http://xekapakifujekem.onlinewebshop.net/catfish_fish_farming.pdf
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_84c9c6c4b00140dfb8b10c83581aa498.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ddfd186-3670-41ad-b19d-e3a02f78bdd0/math_destroyer_review.pdf
    • https://18574fdc-dbe8-4f24-a3f7-ab3d6ff540e7.filesusr.com/ugd/d45bfa_cd2e51cf03ed42bfa438136203cd4937.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015711.bin
10f4fc0c19a852444c820e04eb52d6b6184d69f54af103f9baf2c2aad177f146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15711 4756 bytes
font_01_sfnt_off0001672f.bin
98c44944ea827b6cc2133b0c6e6533f3360b25f7ff9f1099fdfedd67fdffae35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1672F 12144 bytes

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