Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea1785007c58416…

MALICIOUS

PDF

74.7 KB Created: 2021-09-18 17:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 746c22fe82cd26838984c57d59ee970c SHA-1: 48443a6bc567efb302c89e233a33459b380c6c1c SHA-256: aea1785007c58416dd0aa8ef005b0b13932ebff8ace0224b676d7888c23743b9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, 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 heuristic firings point towards techniques used for redirecting users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=dr+joe+dispenza+becoming+supernatural+pdf+free+download PDF link annotation
    • http://compsult.net/userfiles/file/81698896115.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/79100457250.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/24166578044.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/tojopilexojixejigimak.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/zegamepovepenolijiwoki.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/76072793673.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/tikulu.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210913_221615.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4bfbfb55c46ec57ec61633800ed3f054/68066766617.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/raxoxopaxugawujifizi.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/ruzetafetokilixilozimu.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/dozowisojufe.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/65150045190.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6501_20210901062106.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/21003311206140481518bc9.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/buloregutowofulawen.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/98911836681.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/14317136844.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/07/27936849761.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/70731651548.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/wumuzafom.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/bizofomofawikipifesu.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/68188494457.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://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_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 11480 bytes
SHA-256: 958001b20680ad0b415ffda5069363f7332f3bd6b05f3951f0f37769af8b4533
font_01_sfnt_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 16668 bytes
SHA-256: b631571f07cac74b0b35858cfbac837d449042f465be11d8fcc8aff47bb5c35f

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