Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5b9764a5f5c8de…

MALICIOUS

PDF

89.1 KB Created: 2021-07-15 17:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 698454851e54dde41b7e4b2d1bfbc3d4 SHA-1: 4c948fe0c906a7be33e4bdb3235ca86ebf209ded SHA-256: 2c5b9764a5f5c8de22b9482500656fb9b1a7ec5c4d34bd8bb890ac111027d98a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or appear to be part of a link farm on disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple links to potentially malicious sites suggests an attempt to redirect users for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/09fb8fc3c4c79bf393741bca7faee63c/wugajeguvanaluzit.pdf In PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bdffabb22998f639a5696a9093e23cb5/zutijepixaba.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d53969b7352c1244d825317d21e4c6f3/sulever.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/59978944694.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e7ed98822d5b4b54cd7bd42ce5fd4035/68522203214.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/dpm3bg7e2jbb9h5b7cm99nh7v1/tuwojat.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608299b55cbc9---25448609677.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/42f0afb4610597a21ba59832fe530774/lakudow.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/metozekewuga.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/f2572bae5aa5444d1e58164ce4579f40/moxibuzazujeweruw.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076190e0476f---sevojuxokeriri.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a81c69a0644---84265339325.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090a6e794a49---10046567266.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/15961640445.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a077160bc21---gedorusadoner.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/70122605291.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/76121227066.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2d4010702---10124015145.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/39280771488.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/movizorogot.pdfIn PDF document text
    • https://dcimx.com/files/13252289315.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/33077321213.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/76555552587.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a41d07a39ab9ee899fde549e9bec1e52/vetorawemisiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=modern+chemistry+chapter+5+review+answersPDF 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_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 17496 bytes
SHA-256: adf7f4b55a271ed97dfa229f8658510515275a75ab7b46f6d2017e6fb9cd47aa
font_01_sfnt_off00012527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3E 11128 bytes
SHA-256: 8526e9f0cdfa1e805cdbb5efbba3ad71bb2560b15ec5cd84c1740d44d42ae85c

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