Malicious PDF — malware analysis report

Static analysis result for SHA-256 30725fde22ef9b18…

MALICIOUS

PDF

73.0 KB Created: 2021-04-03 20:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e36f2626bb835b49fa4683cc1989fe63 SHA-1: 913445d43e176af9d222f77c7a07d69680d6a15c SHA-256: 30725fde22ef9b18e1b15c2f6511796462b730d87ce9bbd8266532d2bf474c15
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=samsung+rugby+4+volume+too+low In PDF document text
    • http://fapseo.ru/26021430369kmo72.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/gy6_engine_losing_power.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/mechanism_of_action_of_anticancer_drugs.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/how_to_program_steering_wheel_controls_pioneer.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/ferraillage_escalier_bton_arm.pdfIn PDF document text
    • https://cdn.sqhk.co/lonogodixi/BjfhhCz/audacity_plugins_pack_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_6004b3107a74e.pdfIn PDF document text
    • http://yoga-fitness.space/brinkmann_turkey_fryer_manual076et.pdfIn PDF document text
    • http://cyberlife.store/how_to_plant_red_romaine_lettucemouku.pdfIn PDF document text
    • http://futigovu.scienceontheweb.net/adjectifs_et_pronoms_demonstratifs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_60477c378a830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_603109e205e8b.pdfIn PDF document text
    • http://makeyourself.xyz/the_breaker_anointing_book250ob.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/fjiYFoq/motogp_racing_18_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/wawerugile/ciijdeP/video_editor_for_android_2._3._4.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/tu_puedes_sanar_tu_vida_de_louise_l._hay.pdfIn PDF document text
    • http://connexion-amelii.xyz/setisikufowiganlq965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_603366bf78335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_603194b2559d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/effective_interpersonal_communication_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75881e3-ceb0-42ff-9a46-4b71687569cf/1022024444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05cc908-fb11-4023-baa9-34baf5c0437f/true_detective_season_1_episode_4_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d36201-5613-4e6f-818c-3a4e73c7657d/vajedumefibug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc208c7c-c55a-4506-8a03-b83a85e379c0/sonapawogifotipubovedov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ecf864-7245-4156-b5b7-0118bfbbadfa/air_force_one_love_letter_price.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/55254178285.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_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 5588 bytes
SHA-256: 331f815cca18f31d7fcda30d50228d5033fdcf1c39d68471903357d29146989e
font_01_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 10428 bytes
SHA-256: ad96d05efd8f5d2dfa284ce66b71771de5651e6b7329da5e4df4109e46b90b88