Malicious PDF — malware analysis report

Static analysis result for SHA-256 865159fa9981a33e…

MALICIOUS

PDF

96.4 KB Created: 2021-06-25 23:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25f306f7916a3da3fd125954ec193cae SHA-1: 8c24d2483ec2acf6fd85430457f39feb1eb19415 SHA-256: 865159fa9981a33e63b79099da20f0182f8b89d4132b3f6bb84011b8f8c8406c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/84250021337.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7d6a57ff5---tidopegiwosipotutopuvati.pdf
    • http://struttur-arch.it/userfiles/files/59436360277.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800dfe207ae---9693350074.pdf
    • http://tipsclubcr.com/campannas/file/powema.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e2dd52a24---terifitabuwujil.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d04a075385---lasemera.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af9dce95a5---82416951046.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7765797b0e---mowepefilo.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gdagqo3squvadkgh8fs9dmd173/bopeli.pdf
    • https://techson-cctv.com/upload/file/dekewaxo.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/80d8da7bcd9cc11609664c8bdc8ad15f/58343490304.pdf
    • http://internationalnetworksolutions.net/files/vanenexatuzejodipuselukas.pdf
    • https://atlastoursntravels.com/userfiles/file/81239427500.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/83f4a0be41022f05b18d0990dd7b1eb7/wogunuwizenivegi.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878308c165f---rowalemowizovazefarigoz.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/vav6otp88iodiedfpp6l0bp28o/63682766004.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/xozezatomobokipakodemeb.pdf
    • http://sosnovgeo.ru/userfiles/file/50792604869.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/26ca2aac0931797966808e8f23a36b11/92317226031.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a918b738ae4---17111915650.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/79bb71f5e12a6c267c492d3b5f02c91e/benejodotafu.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3467b7cad7---6822336192.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ba627b0f3---65636154064.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=monotheistic+and+polytheistic
    • 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_off00010e5d.bin
d28c4b260d5bfdc8ea43cbcfeaf0c4b3ccbb82a50c3d640a517b96bbbc0d304a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 10620 bytes
font_01_sfnt_off00012698.bin
5ac66dacb2f89147e03f6d5bd6a83ebb7a2d1517b8fa0e68ca3b95e3897b9ee0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 20792 bytes
font_02_sfnt_off00015c47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C47 16792 bytes