Malicious PDF — malware analysis report

Static analysis result for SHA-256 226d149f563039dd…

MALICIOUS

PDF

95.7 KB Created: 2021-07-04 03:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5111ee0458c6a708fa4db3aaa431bf4 SHA-1: 36243f5218365079739ab50f6270e3c57f956669 SHA-256: 226d149f563039ddd8517c63cd8db953c096cc9b3a37ead73c4e71491ebdc0f0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely to host malicious content or facilitate phishing. The document body is heavily obfuscated and contains no readable text, suggesting its primary purpose is to redirect users through these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/420810c81e6370d0771b18ea0f2c599f/topuno.pdf
    • https://lawyerupsmart.com/tempimg/file/52238622546.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca0b83ce6---69166183252.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e19ff17584---54121448031.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ede59304e6---bizulaxixefagif.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097f2844c64f---89671527320.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e9628173322f214f6592b9ca523e1c89/51521546627.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b43cf7e8d5---81172380701.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e4b8d726a---68325855912.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/1dd77d8d1874b7d3731a0fdd6a5381d5/xotawobodegev.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/rkb24tg50e2j01jva6e4tnn46d/58332646541.pdf
    • http://wildpflanzen-planung.de/file/fisigadaxedeseb.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fe6b1f67a---19054727269.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607751614e6bd---7511732150.pdf
    • http://bscsaoner.in/ckfinder/userfiles/files/bukukopozofuguso.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aea7be79900---kikivipajerawome.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/cbc0f80e92e447318fcaa137cb8a2315/61069631047.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/f0fa88cc8a47472bea1bf64ac76011e0/84830796168.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609855e9d9051---pabixubokubagabeva.pdf
    • https://accuratesearch.com/userfiles/file/71703121655.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7cdf2a37e---pigorojenudumovemo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=phototropism+and+geotropism
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c0.bin
9897fd11bdc2cc3cf87f63db6fdd614b4823ae14fa740fad98a9b5b9a188742f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111C0 10796 bytes
font_01_sfnt_off00012a3e.bin
b9603708075fd655ae3f97ecaa790f00c4b04273289ea0382bb4b628762b3bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3E 18544 bytes
font_02_sfnt_off000159aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159AA 16792 bytes

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