Malicious PDF — malware analysis report

Static analysis result for SHA-256 df008ab1990302f0…

MALICIOUS

PDF

86.5 KB Created: 2021-07-01 10:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5cd2aba21c54adfd6149e674cf063c7 SHA-1: dfc940037736cd8a835793b173f2bc2241f033bf SHA-256: df008ab1990302f0a9de53a454fc5cea3063c9c9575034ec209baab4f7d812ce
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. Several heuristics identified the PDF as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, while numerous, do not provide a clear single objective beyond directing traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c98280e8ad9---pozemumepowuso.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/cms2ifvd2mk5eb7hs7bb32jmao/juzixumogugoru.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/f8f0cfa4befce5f367da8b672569aabd/gedovikapelusom.pdf
    • http://ansonseatery.com/uploads/files/47223913547.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3aff50163c---xiregerukawok.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0ea9c6bcd---fasepasobevumodase.pdf
    • https://alula.com/wp-content/plugins/super-forms/uploads/php/files/010942b6522f9c56712113ea6d4315fc/79404813262.pdf
    • https://mimpishio2.net/contents//files/dezabozovijoxi.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9f54d5bc4---39475708901.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16086471089fe1---buvomasatubinag.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/k53rt678a9spdb0bmho9lhl4bv/39912175470.pdf
    • https://africanresearchcenter.com/userfiles/file/kowidalivubulofale.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927f5b662c1---16618831266.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afc0943dcc1---vadudigivepa.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/07fd05968494b7e3bba9f520e9be4753/xezawovezovopabivuf.pdf
    • https://alatheir.com/atheirwsfiles/file/82879126011.pdf
    • https://weddingitaly.jp/images/file/89022784681.pdf
    • http://whalesart.com/uploadfile/file///2021061111233036.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7be1f1c572---29750737817.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608abaf1c7f94---guwogomena.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b4df80a8c26---givisarane.pdf
    • https://briljant-maleri.se/UserFiles/files/mabuzugitejon.pdf
    • http://softwarefactory.nl/images/file/26493391175.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=guess+the+word+facebook+answers
    • 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_off0000ed93.bin
c441ec647553ab2b5f168af8bb4327dc296263f9af09b45fabadf9f0a30ba0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 10892 bytes
font_01_sfnt_off000106e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 16792 bytes
font_02_sfnt_off00011ef8.bin
56476b02b53c4f65c6507c537e96ad5b728f79662e34b2a07471675ef08f35dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF8 17336 bytes

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