Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61708460e02c2c8…

MALICIOUS

PDF

72.2 KB Created: 2021-06-30 06:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40a439e3e1252894ee299a268f865cb9 SHA-1: bba8465c82863df6352b301f03cd98a1740c5268 SHA-256: f61708460e02c2c8d4cf96bb3c3a050e2a709f56c94bece0bb8b7a4d7e1642a6
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 ML classification and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=kinetic+theory+of+gases+questions+and+answers+pdf
    • https://samarpanbharat.org/trila/userfiles/file/kififodegatesuxirigujepo.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4c88e9bcf0397d3102109b15a8574563/74513322515.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/e9b4nt0vtc4vfqbb82l7sigtsk/xaladisemo.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a55c63dd1e---5400042529.pdf
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210528030204.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b75013f191d76c9f4978d5c1ad3b4c17/86812748844.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/np1c74oi5roqb1acgb5ums1geq/39731913436.pdf
    • http://haciogullari.com/depo/sayfaresim/file/xitorodepenusujisom.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f8a18eca20f981679230c74ecd62d745/54750636264.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hv9159h3ioh6ne1kinmrtjtpb5/xifuwuf.pdf
    • http://newtarrytowndeli.com/uploads/files/surubafakegarewuva.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/42892459375.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/3a2f1cb1894cc9d11c9dc156271798aa/545384061.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/64f4987dced2f021c93f794816313cd9/71912979523.pdf
    • http://universalestetic.com/userfiles/file/41239946838.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db71cc66d7---94574144780.pdf
    • http://elm3rad.com/file/biruxotopufewaj.pdf
    • https://grup-insaat.com/userfiles/file/mibijovuzewese.pdf
    • http://renovfab-menuiserie.com/userfiles/file/basotegaterelojijado.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b92519da272a3ff583b8427924ded41/27926656425.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2248d43543---wutotakevavibujutumo.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/d034fb349e13e7e9144dadd4bf169418/4602734445.pdf
    • http://coiffurenais.com/userfiles/file/kepuw.pdf
    • http://ropesadventure.com/d/files/81231677457.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_off0000b851.bin
111ef362ec1ebd270849d9aec30a54e581c2f2d0c9c574347325b06ca7b1db8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB851 11288 bytes
font_01_sfnt_off0000d25a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 16792 bytes
font_02_sfnt_off0000ea6c.bin
e414396f93a16ccb8cea3e108af70a015614bc052b55c43744fcc43f5d1d82b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 15760 bytes