Malicious PDF — malware analysis report

Static analysis result for SHA-256 95199e639e7df30e…

MALICIOUS

PDF

73.4 KB Created: 2021-03-12 11:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ca883671d732bb33bb1beff096efafc SHA-1: 3c57abb3ea170b65d4d4689bcc72661bba425584 SHA-256: 95199e639e7df30e4dbbccd1c555b2a55ed718e9b34f96e861516ac12804567b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=jeet+kune+do+training+equipment PDF link annotation
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/zuxejozikugeduma.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/tubisovovisuriz.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/nixalotixuxijiwaletug.pdfIn PDF document text
    • https://ponuwusareti.weebly.com/uploads/1/3/1/6/131636782/navesisasojoge.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/tenarawoba.pdfIn PDF document text
    • https://gutefuwufoja.weebly.com/uploads/1/3/4/4/134460602/6192188.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/immanuel_kant_books_in_hindi.pdfIn PDF document text
    • https://luzejezoroze.weebly.com/uploads/1/3/4/3/134361740/lidutoxufowikaz-vudolufaluge.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/JwgjoLC/83049535067.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/dihiehg/download_diamond_calculator_for_gamers_ml.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/Jjf8ge0/bobelazojijedopulapoma.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/fidew_pelunaju.pdfIn PDF document text
    • http://zodukif.iblogger.org/nonton_film_master_and_commander_the_far_side_of_the_world_sub_indo.pdfIn PDF document text
    • https://cdn.sqhk.co/mogujawogo/idha8iX/latest_android_tv_box_malaysia.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/p2lgifW/download_tuner_gstrings_apk.pdfIn PDF document text
    • https://sikewebuki.weebly.com/uploads/1/3/4/3/134387003/tanig.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/xajibatu.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/lord_of_the_flies_chapter_questions_7-9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fidusigugowubo.epizy.com/are_quartz_or_ceramic_heaters_better.pdfIn PDF document text
    • http://tiwojojerat.rf.gd/folisewobubibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d66df1-2729-4d34-b36b-1f97e188a83a/samsung_rf4287hars_water_filter_part_number.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/what_is_the_name_of_the_gatekeeper_of_hell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51a9ad4-6a92-4f18-b8de-a28991c684b4/tisevipokamuzikediv.pdfIn PDF document text
    • http://piredesoki.epizy.com/destination_wedding_budget_spreadsheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B4 5128 bytes
SHA-256: d2d8e4001cbe54c604b41ae87dd9c165670c86d74c846b40a5dc562e1a54868b
font_01_sfnt_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 10120 bytes
SHA-256: fe75a1126851b9bf9711e65ec4913fe355f1c9bce674549bc0ebc2c2ed086321
font_02_sfnt_off000109d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361