Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0065cb83c03a827…

MALICIOUS

PDF

81.4 KB Created: 2021-09-28 18:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efec10839444bf1799ff7b61b4a05303 SHA-1: 17017d296ab9df026dca39c03361c87eb242636e SHA-256: e0065cb83c03a8276b0e4873601e2ec25a14d979cc6c23fec6c101c15755ce0d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=flamingo+free+robux
    • https://bazab.ru/ckfinder/userfiles/files/jolafedosiguvirataved.pdf
    • https://strategieb2b.ca/userfiles/file/xazaparigem.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613208069c8f7---talifipuzifewalagi.pdf
    • https://iword.de/userfiles/file/43115019775.pdf
    • http://realfootball.gr/userfiles/file/forudolud.pdf
    • https://yourownadviser.com/ckfinder/userfiles/files/konosifizesenosipubula.pdf
    • https://cahayamimpi1.com/contents/files/jitoxexinomifikorejom.pdf
    • http://maudchristan.nl/ckfinder/userfiles/files/58629056347.pdf
    • http://dvg.asia/ckfinder/uploadfiles/files/ronibimezojosarivap.pdf
    • https://imaggu.com/ci/userfiles/files/wabefes.pdf
    • https://hw-power.com/uploads/ckfiles/files/61481954753a9.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e0880c2e586a43266a57c0606694c297/6644642364.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/331b155be47fb9e71cf8c8709c295cbf/68637571809.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148147abba22---16010166148.pdf
    • https://aildf.in/userfiles/file/jutunaxuzabarekom.pdf
    • http://www.tomasjelinek.com/img/pub/file/32412752533.pdf
    • https://wheelmartthailand.com/image/upload/File/fulevasivetonuwoxesube.pdf
    • http://aaz.sk/editor_uploads/files/mavoxorizepakamuroluko.pdf
    • https://alwillislifecenter.org/ckfinder/userfiles/files/81831021419.pdf
    • http://tatvideo.ru/ckfinder/userfiles/files/97746503883.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/xofag.pdf
    • https://badoza.net/userfiles/file/witapidigukubiserube.pdf
    • http://panel2conso.com/userfiles/file/89228791380.pdf
    • http://kgmda.com/upload/files/divuzumibudix.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_off0000d2d3.bin
761f91d49eb3563234029856bf23359ead508e5e71dfc87ef9ba347e80289e26
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D3 10612 bytes
font_01_sfnt_off0000eafc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 16792 bytes
font_02_sfnt_off0001030e.bin
914578fbf03b21550e578029f965851e38d8070e398db9add51ae767daabe072
pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 20272 bytes