Malicious PDF — malware analysis report

Static analysis result for SHA-256 106bcc62a94f3ebd…

MALICIOUS

PDF

70.2 KB Created: 2021-04-25 04:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a4d435a3affac936d135f59b007c6b8a SHA-1: 270d61a4a250f5d48b83252c035245991e96d527 SHA-256: 106bcc62a94f3ebd97bc799b878f6c2c8c076d9b7cd55572074ef2d2210a57ca
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'jumiwimov.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to repair costs, aligning with common phishing pretexts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=how+much+does+laptop+fan+repair+cost PDF link annotation
    • https://cdn.sqhk.co/mojazejo/jdhPjiZ/61269666352.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/65461985069.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/hiJhgxQ/bidumizef.pdfIn PDF document text
    • https://cdn.sqhk.co/fowonawex/8MTihib/sonny_with_a_chance_chad_and_sonny_kiss.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/eijlWPj/archaeological_sources_of_delhi_sultanate.pdfIn PDF document text
    • http://usechambre.xyz/dressed_to_kill_1980_full_movielgg6l.pdfIn PDF document text
    • http://usacreditreport.info/tejutujavamepixazifbwqi.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/mhSSjiS/jixataz.pdfIn PDF document text
    • http://godulonu.22web.org/boxuvaxa.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://xifenarubomes.rf.gd/94794382590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032b95a0-d5dd-49e1-b6ee-9539ab906691/python_for_loop_increment_index_inside_loop.pdfIn PDF document text
    • http://gototura.myartsonline.com/ba_1st_year_sanskrit_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c61089d-cf7a-41eb-8454-c081d0b03bef/how_to_write_a_letter_of_explanation_for_credit_problems.pdfIn PDF document text
    • http://lazoxiro.onlinewebshop.net/95707638506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b93c52-b163-4373-93b0-c02de3ed4914/26116409687.pdfIn PDF document text
    • http://xifuwotemukoxax.rf.gd/cartina_turistica_puglia.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_6bdaf65432754d0d9da1dfd5d8a8deb4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a0a0e5-6f05-4a05-ac46-3e9604441e03/votabonaririwerarudiwaged.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_b4be493a1ea043e98aaf639dbcf225da.pdf?index=trueIn PDF document text
    • http://lufubapiworozil.epizy.com/arduino_bluetooth_android_example_code.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_fe1d49d1c5e14ed19502eeec841cc0cc.pdf?index=trueIn PDF document text
    • http://xevorerokune.epizy.com/the_ultimate_brush_lettering_guide.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_f639e4223b4d4b5eae8e4f726a5960d3.pdf?index=trueIn 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_off0000c95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 5332 bytes
SHA-256: 1fb22712f3bed9537c09b7f773c9367876f75eef9471512817e13747ba05de37
font_01_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 9852 bytes
SHA-256: 1b9aabc8d7acef45e593dfc3decfed729286fb3543d1e8debdba422719dd9e95
font_02_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333