Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c675569eb90599b…

MALICIOUS

PDF

89.3 KB Created: 2021-07-13 16:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 895dfd839a3feb520a0ff586757fd16b SHA-1: 4dae6b5525c8bb520a2edaa08ddd2d7e93566b15 SHA-256: 6c675569eb90599b5af81cae27616bfe1220ec055fb8ff01f59680632aa35026
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to websites hosted on compromised CMS platforms and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://alhouti.com/userfiles/file/51388155181.pdf In PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/1655a7e0f11491f55e72db694245bd68/46946612464.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/49682746337.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608560ac4e62d---78468545489.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/vabuvogokuxijudara.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/28795694969.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a11c6986a8b---mozax.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764bbef28f4---funoduxewod.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/28286742934.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/71494300611.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f7fbb352e47ed25004e03928a76adfb0/23417181001.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/64804738331.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/21475282430.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/51809549176.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/nejitatuluf.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a28a16a743f---19669058052.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757837ea106---ginaleladubemopukefifod.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/magubilepuw.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/60v0agvlngm6nh19faf3ru1f90/51266248.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbe032b58b---befodewa.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/26473788989.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/eb5772ec2ee0def86c34cc83e49fef90/6180139296.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d808623e3a---41975439815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=parallelogram+problems+and+solutions+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 11080 bytes
SHA-256: 1aed2d62d645de973ed567ca48040aa8130af5ee631802058dfe1caf53a6e9b0
font_01_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_02_sfnt_off000111db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 17220 bytes
SHA-256: da61f0bbbae3cd9aa14426d30529d2e098c5d0e0cbdaba8f42bc1fee2c6b02fd
font_03_sfnt_off00013f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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