Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3715e67139d517…

MALICIOUS

PDF

85.3 KB Created: 2021-05-02 23:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0c60a658ece9383a8c022074bcde0288 SHA-1: 56d52cb4d96519bff79a1247da449c63e2364c07 SHA-256: 3c3715e67139d517e3267fcefd129c5b161adb0c5c30652dd891f4dd724b372b
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 0.9990

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://jumiwimov.ru/strik?utm_term=my+zone+headphones+walmart PDF link annotation
    • http://bioforce-co.site/what_causes_you_to_get_pimples_on_your_chin6x4hq.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/the_science_of_accelerated_learning_download.pdfIn PDF document text
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/zalenimerasazas_mibuj.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/34080795830.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/dovusotelusogig.pdfIn PDF document text
    • https://dakezevowefop.weebly.com/uploads/1/3/6/0/136088489/fopum.pdfIn PDF document text
    • https://xemelavu.weebly.com/uploads/1/3/1/4/131437726/zulinaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_601a998eaf8e8.pdfIn PDF document text
    • http://zazixewobid.22web.org/columba_livia_domestica.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/b9237f583ddf8e1.pdfIn PDF document text
    • https://banodita.weebly.com/uploads/1/3/4/3/134311275/xezomegop.pdfIn PDF document text
    • http://fito4ka.xyz/contingent_asset_off_balance_sheettvalh.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/vikorugul.pdfIn PDF document text
    • http://sarhello.online/51197994363pa23i.pdfIn PDF document text
    • http://organicnu.info/nvidia_quadro_p600_spec_sheetqv4rl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_60163dd54bd7a.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/why_is_my_logitech_keyboard_not_connecting_to_ipad.pdfIn PDF document text
    • https://folixesu.weebly.com/uploads/1/3/1/4/131453530/8183306.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/73039852491.pdfIn PDF document text
    • http://badge-verification-center.com/espncricinfo_apk_for_androidz4n8y.pdfIn PDF document text
    • http://welifenepural.iblogger.org/where_are_the_military_bases_in_dayz.pdfIn PDF document text
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/3a00bd573bb017.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://roveramo.atwebpages.com/buluwufufawokojiwawaxi.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/31994802336.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_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 5188 bytes
SHA-256: 567c8c0b39e9e69d1a6f9d268325c1baa8ba29c4136221b6b70de906e81ae17d
font_01_sfnt_off000113d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D5 11248 bytes
SHA-256: 9448c4cdbb6fd332266ba414be3d8f81e26663e936367b2da80a82cf2f03d66e
font_02_sfnt_off00013a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A21 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2