Malicious PDF — malware analysis report

Static analysis result for SHA-256 483ec82c97d17045…

MALICIOUS

PDF

77.3 KB Created: 2021-04-17 22:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 003f7c4030dd77d64ad6332417fa870f SHA-1: 5592e3f18f4aa1041db2540066e71a05191c1f91 SHA-256: 483ec82c97d170452f1faf6f92ee6e7b54f0e87b29060f165343dfb7326d7976
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware. Although no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect the user to a malicious site.

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://zajinet.ru/strik?utm_term=integral+of+1%252Fsin%255E2x+cos+x PDF link annotation
    • http://mobeditobaxul.scienceontheweb.net/zofukumalugimuvoredog.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/social_media_marketing_business_plan.pdfIn PDF document text
    • http://shoop-fk.ru/scotts_lawn_mower_services33b7j.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/cigjhii/90091928359.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/almidones_modificados_aplicaciones.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/hDpTTic/9244273469.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/XQvm9ja/banner_saga_trilogy_nintendo_switch.pdfIn PDF document text
    • http://gizapiretade.iblogger.org/wematadovesitoritipuj.pdfIn PDF document text
    • http://naturfresh.space/78033679919jc9ot.pdfIn PDF document text
    • http://shoop-fp.ru/tabletop_simulator_single_player_gamesee07p.pdfIn PDF document text
    • http://joxufovogikera.iblogger.org/cheat_droid_pro_root_only_apk.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/league_of_legends_patch_10.24b.pdfIn PDF document text
    • http://scoretdho.best/tapipopugofj4xzv.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/fcaf7412-bc46-4398-b4c4-9b6b3de5e5db/54171440609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23c15dc-7797-47dc-bfd8-463e134d6922/how_to_layer_mask_in_gimp.pdfIn PDF document text
    • http://bepujegixu.epizy.com/can_t_stop_the_feeling_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a70a626-2a7e-4849-a3fb-b4636a58bbd4/tafetusipudujedekobe.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_1e36144e55e642ddab947025eb6f4491.pdf?index=trueIn PDF document text
    • http://rafoputoxuxu.epizy.com/19860606222.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_551e4eb037154c4ca37e87898d41f17f.pdf?index=trueIn PDF document text
    • http://fomepufasele.atwebpages.com/79206275814.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_69f4823463d44b89a9118f3842ec40d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/316edec6-6387-45be-a674-2f5ef10966e4/what_is_earth_and_life_science_grade_11.pdfIn PDF document text
    • http://kuwaxubopuzar.rf.gd/external_organs_of_human_body_and_their_functions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A1 5324 bytes
SHA-256: 4af589f9bdd319a68d84275004f265b781a6923427c6380066180ccb4f6fa422
font_01_sfnt_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 12148 bytes
SHA-256: 752f216aabd796b08a93b2320659ff6e8f971332e67f8a560dbe8fb53a2d3672
font_02_sfnt_off000112ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BA 16080 bytes
SHA-256: c0982807324681c2194e80f3f637ca3700f5bf2c32718b44bdc390b4bb628087