Malicious PDF — malware analysis report

Static analysis result for SHA-256 209f2fbe0135256e…

MALICIOUS

PDF

92.4 KB Created: 2021-09-07 02:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf0612f414b5380d91842b1b613aa3e8 SHA-1: 2a59a59e1355115b9a216b8bac9f8b7b7fd253f2 SHA-256: 209f2fbe0135256e43dc61b81727b620cd799ba90d3ff1c7dc9b4e6e41c69af0
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://pc-driver.ru/userfiles/files/80592081064.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609997cae920f---reratapekunewuzedadazomer.pdf
    • http://maristaslardero.es/userfiles/file/19914855791.pdf
    • https://calmoinc.com/upload/editor/file/36022221725.pdf
    • https://synodradomski.pl/userfiles/file/92766813491.pdf
    • http://ttmplus.com/userfiles/files/jurejapenetavenuridu.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/7e4331a34efb974799f575104038b9ef/56809207879.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076f91498703---17941807211.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12818246929.pdf
    • https://etcbt.com/userfiles/file/leseloxegodugi.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/61482335801.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9926e0fca---82346430269.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3086a489---11122333556.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ea78f060bd9f3f0ad320bf666f861231/69751929836.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/6a3mreq8mr36q55tks1fhjf92n/70608803260.pdf
    • http://abwrva.com/uploads/files/mimevivutuwokudotezeso.pdf
    • http://immobilieninvestors.de/userfiles/file/97814398153.pdf
    • http://recviem.ru/img/upload/wifuzebipavizer.pdf
    • http://thongthien.vn/upload/files/sigekud.pdf
    • http://www.hgbehringer.de/img/files/files/betejopuvu.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/1c87e5c75ac4e66a923f4455f517b2c6/24159203536.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160adc17c2741d---16106673407.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65fabe5d4f---gavisiwigalozenivogobojav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=libro+nomenclatura+quimica+inorganica+pdf
    • 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_off00010043.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 16792 bytes
font_01_sfnt_off00011855.bin
09f32fafb0fe0221efc3745a3207fd99820646ac0bd9c6459bee8963bfad6a27
pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 18836 bytes
font_02_sfnt_off00014a1d.bin
133978937721576785a13a6f73ab93e493bb4ce9f765107d0d57fc4517aaba84
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1D 11140 bytes