Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a033769d5ad2f7…

MALICIOUS

PDF

89.6 KB Created: 2021-07-09 00:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4b75d138c0d26306580948f6bf882b61 SHA-1: d2719d200c86aec6b7dd77086f10f4029b79ea0a SHA-256: 02a033769d5ad2f741fc5074be3f6b47d6ac8e080ccc9c2d421287ee10ac6096
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alliusie.com/userfiles/file/54185694470.pdf In PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/q0eabg3bn6supfq46h6gpnojd8/manumolujixezawojit.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8dff4e79dc4bed1c7e0ec504ffed642d/xapotijixewagovegagudufu.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/telajigovapawufe.pdfIn PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/gomesuku.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8af3e5f413987b8f8e64225898099370/duviwinowuvage.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d561c27d0---joroluduvilivanuvagololup.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a5c78d74a---38421908077.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/927197a5e4fd70f9f834ab12c7a5ed18/vavisemebarolonadopopiv.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/36911129398.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f07ad14ad7---84929379317.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc35f70704---99611048500.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/brfsi6pqd0e1idrvhlgdqq4g52/bopevitejorobu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b95520d844---rureromumuwe.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/jifififexoxel.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/zagoma.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/55013439005.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/876900117acbd77b6722d3955a1b1882/32550754397.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ad56969742d70871477be307f19ff5b7/duxevuparuzijer.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3badc497a---kenonugubu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c4a650aad9e56b0dbf8e7b9ac4b83916/61865748017.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ca8stoj1vrsnddg4u0fpvcai07/koxebomexewok.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a983509037---kabipamojujavaraneg.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/189761897c9183809e1b3d16ca990fd4/fubogupabufadopida.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/nijitr7jv22fq2bsd7mv1s59fi/3837191716.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b167a562a7c---8948025138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=gate+reference+books+for+mechanical+engineering+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_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 11336 bytes
SHA-256: d4e3d89c1775ba550cc8baf89fc92db27477a58a8378e265809bb5f3e6e314c7
font_01_sfnt_off00011206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A18 17120 bytes
SHA-256: 54c10430f9772d714673a780c4fbc28fa1e95e8127deaa1a2df58e279c4cf4c0

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