Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e79061fb51136ec…

MALICIOUS

PDF

140.8 KB Created: 2021-04-03 23:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2d3898cf10bad910ae979d82d9e3aad2 SHA-1: 7cc297ef1662e87cb419e16a04e02061998d9041 SHA-256: 6e79061fb51136ec4b23376e2be2bc55ada701b6e362228b667e0f7f6bf67af4
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 attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/aws?utm_term=just+two+words+1093 PDF link annotation
    • https://cdn.sqhk.co/worekoxe/m5xhjjf/sky_force_anniversary_review.pdfIn PDF document text
    • https://vorufiduwesonuf.weebly.com/uploads/1/3/5/3/135314955/wiwote.pdfIn PDF document text
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/c7035d42.pdfIn PDF document text
    • https://potunajasufa.weebly.com/uploads/1/3/1/3/131381619/7382119.pdfIn PDF document text
    • https://jumozavuna.weebly.com/uploads/1/3/4/5/134598597/xidutavoru.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/tonodobuwopogu.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/5gc3ifQ/download_smashing_rush_mod_apk_versi_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/ihhfjgt/game_of_thrones_swords_names_and_owners.pdfIn PDF document text
    • https://tafevivif.weebly.com/uploads/1/3/2/6/132682704/8627255.pdfIn PDF document text
    • https://zemijawa.weebly.com/uploads/1/3/1/0/131070152/9c119c.pdfIn PDF document text
    • https://nifonafepo.weebly.com/uploads/1/3/5/3/135319448/686430.pdfIn PDF document text
    • https://fagoloda.weebly.com/uploads/1/3/4/6/134649735/waxokapobizu.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/57902093111.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/110738.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/vtoiiid/fijulu.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/gxibz7i/26094972061.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/lhjhaKs/jejose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejibokakar.onlinewebshop.net/34251502326.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_108ab5ab8c724cd68203e2b2572ad03e.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_da53ba50beb64a6196dbecc4bf384e87.pdf?index=trueIn PDF document text
    • http://zekezixurul.onlinewebshop.net/american_english_file.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/wedding_planning_budget_template.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_9819ad3a874c4463a1b1cc9a7985eb41.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
    • 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_off0001d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D503 5172 bytes
SHA-256: 20c468bd4d8f8f758c74d7991d831e6d8f02554a99be91f1903f57b3a127c854
font_01_sfnt_off0001e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6C1 11956 bytes
SHA-256: 5b1358e29a5ce23dfbdff6e2573ca9b404d3a30589dc3c594b81a54aa703a3aa
font_02_sfnt_off00020ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20ED7 16448 bytes
SHA-256: 3f7f6beb0f5865f83039c8434023d34048916fbab515aea8bfee4d6c7e3f3101