Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb024ab54a117f4c…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 17:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 74e74700d5ba19b3ff879fafe499c9a0 SHA-1: 676e617bf27e8deacf74aa2db7168c80c3844854 SHA-256: bb024ab54a117f4ca67de1ac3a86946986bb0013f61c9c243773047b0515866b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating 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 numerous external URLs point towards a malicious document, likely delivered as a spearphishing attachment, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://seumenha.ru/strik?utm_term=catch+me+if+you+can+musical+songs PDF link annotation
    • http://gazuravalo.iblogger.org/65325133770.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/rigebozigajapot.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/nemifigapamidis.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/dajuv_baxolumivuvek.pdfIn PDF document text
    • http://defi-bet.world/recipe_for_red_lobster_chocolate_wave_cakeimwtv.pdfIn PDF document text
    • https://wotixefutakit.weebly.com/uploads/1/3/2/8/132815753/4688459.pdfIn PDF document text
    • http://pavareginuko.22web.org/nezoparokelabuv.pdfIn PDF document text
    • http://jewigekavevexi.22web.org/yamaha_mg166cx_price_in_india.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/5544565.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/mimebifinoke.pdfIn PDF document text
    • https://wobapuzufisuro.weebly.com/uploads/1/3/4/0/134042344/6e25cf6f0634d.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/coTSYic/red_ball_3_unblocked_66.pdfIn PDF document text
    • http://salonhq.xyz/66476785041mlub2.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/iaZhcgf/majesty_northern_expansion_android_walkthrough.pdfIn PDF document text
    • http://erogancolumbia.site/426130833510cc2x.pdfIn PDF document text
    • http://balifruit.com/motor_learning_and_control_conceptsvdajs.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/5901227.pdfIn PDF document text
    • https://jovovanin.weebly.com/uploads/1/3/1/8/131871717/favebidolitezuba.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/gjigtWa/friv_games_100_juegos_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/ajhXje3/girly_playroom_ideas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/modal_auxiliary_verbs_worksheet.pdfIn PDF document text
    • http://bavodokebak.rf.gd/commandos_1_2_3.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/athenagoras_of_athens.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/dunizedetefivaso.pdfIn PDF document text
    • http://fewabasutagit.rf.gd/31246819941.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_off0000f34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34C 5208 bytes
SHA-256: e5ec1e8fa8a90b382a4d24d3a96caa85c73b407672082f90b2fad91a0494ffa3
font_01_sfnt_off000104eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 11184 bytes
SHA-256: 02b7f1fa2a68f176a08cbee612f6de03df8129001cc6b001be9e63b4910a829e