Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fca399b1d82a6c…

MALICIOUS

PDF

97.1 KB Created: 2021-07-31 05:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7d4d3aae2ddc7b9bed7c5224fb252a5e SHA-1: 836b69057caf0f1930954cc819bcbf494ac61add SHA-256: 38fca399b1d82a6cbefc867376a3302c05dd67e5e6d17cd3ed1768cd1f5b2f16
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nadinerogger.ch/userfiles/files/62699124152.pdf In PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/zaligipiropogirobilijoti.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/lizafujitivoxebu.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/pugujiwuxesi.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/betidunegim.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/13491174313.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/68787459069.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/vokilamekolapolugotijuva.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8086c537af76105f36368858b476e6fa/makolexulapurezoza.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/tanomodogevixefafus.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210529_B6C68E3758E2577B.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/94515691172.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0eaa932676ab46314c2ce34a1b08c12f/jozazojupim.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8566eb8af4a2d0d0869491a16a8ba7c1/julezinejeve.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/ac994760e099471b649a5cbaae88ab94/26887315958.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/976b0ecbe2220b369827ade5283dae5a/56636365704.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/soxuvibolosudajire.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a143448c0f---26785670280.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/sebezefotobafove.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/g0h64qfir5j44u8mqrnl5bmj7j/bizaxugedupasorovixi.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/13732385195.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085311305703---nonewopusidesazomik.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/j6u5mpbf2h1h9e28i4ajv0rgpe/tevakezef.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/dojududewageromupuzukug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+use+bose+soundbar+700PDF 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://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_off000119cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CB 10592 bytes
SHA-256: 32154ef7aca816fd314f2e23718c5a81a32e678b7368a682e0047c66bfffe662
font_01_sfnt_off00013233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A45 17612 bytes
SHA-256: 6f6477296f9d7b0f402b617d29911784670a6e3055e25c501f2cae6bab0d6982