Malicious PDF — malware analysis report

Static analysis result for SHA-256 7247adfc7e60a494…

MALICIOUS

PDF

81.6 KB Created: 2021-09-05 04:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5a1c1024c045f587ceb9f49a245a4333 SHA-1: 384d5a2c3faadabac0674a768e10be2852363f94 SHA-256: 7247adfc7e60a4947ca228bbb30db5a60b0eff3d47d6e228f72a6e9e87f24113
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Several extracted URLs point to potentially compromised or disposable hosting, suggesting an attempt to lure users to malicious sites. The PDF's structure and the nature of the URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gamma-electronics-eg.com/userfiles/files/36107439570.pdf In PDF document text
    • http://whs1979.net/clients/65916/File/nepawidikawekave.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/dudizapikijenavuxese.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098a8ca00553---54782775152.pdfIn PDF document text
    • http://geose.ru/userfiles/file/nefilupe.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/61932651817.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/xatazezofuvabuka.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/dijupurizofosinopasusot.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/29357190334.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9jemji8n61h7bm92b25bgaqoj/99062223447.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/3d2hd904c4aehee9lo9uc6etu4/98784936900.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/tijaga.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f490b7c7e---jivovazapexu.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/vexubomifusununebilunola.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/4777969151.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/53414558264.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/68410117465.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/gukagasalobaxuxataro.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/98380639957.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/67648220700.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/67106156053.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/sofazuzulupi.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/63b34d4b661ea6badf552c05f656bbc9/33836974970.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/287b7g27oc55uuqnqc9cup0pln/37474252695.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/jmumncdp0amokidt643gmh7hp7/sopodoxifirezisujiloti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=valores+eticos+fundamentales+libro+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_off0000d677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 18868 bytes
SHA-256: bc9ffa33c1ae223a28e7b1bc8ac0e1c2c2e2ae5c6e46f7e614242adc57bcf592
font_01_sfnt_off000105f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0E 10988 bytes
SHA-256: bb174f5205d0ed2b58aa657ede797541e1ba32d91367cd05ccf5c0e32d849cda

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