Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69396309b4d0011…

MALICIOUS

PDF

90.6 KB Created: 2021-07-04 03:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3fe128ac675b1f07a874a8acf8e9ac31 SHA-1: a68c0814a1429a68b489913150f86929a7f2c704 SHA-256: c69396309b4d0011b8602f18ed847d6efdd46c244a5766015cc0d1c56469313c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The document body is heavily obfuscated and unreadable, suggesting it is designed to conceal its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd192d3d898---vovutumorodopasixolofe.pdf In PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/200f32527d50f95934e4c927c426da4c/6171061517.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/83582619812.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079369a7390a---zisamosuvamuwukagu.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076b75f8ed45---83244567911.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afac8947194---23159328498.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/25411032445.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/zuronibetusil.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/akq25ni9graieqhutsfenc76tu/43412365368.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/11906426212.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084d1ee3c1b6---xalixise.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72067b879e---22168830108.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6ad8fb9d9815dc2af1a8b4b89ebd0439/vomasijobes.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/vufuxivetugewenalufib.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/6948504434.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bad212d958a---22660051732.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/74240396801.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/47805339059.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077083dc8c08---53278381464.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e06b980d2---numamogubiv.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/76345046193.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/78591610411.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086da154a4e3---guwud.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210703_B7B1A0DF791C2417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cable+glanding+and+termination+procedure+pdfPDF link annotation
    • 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_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 17128 bytes
SHA-256: 8fdee0204135e4e67780f9cfb9b29cf68164c86c39ffe24e9f39c981a0f8103a
font_01_sfnt_off00012b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B59 11064 bytes
SHA-256: 886d779299f05cf3403df5eb57df9a8500b77948753cf6de35ca10618ef1707c
font_02_sfnt_off000144b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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