Malicious PDF — malware analysis report

Static analysis result for SHA-256 c330a2909ff75365…

MALICIOUS

PDF

81.5 KB Created: 2021-06-28 12:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b23038297f0c58efcd35f41a9fc17cc9 SHA-1: 7dc17f416cfad33fa0d333b9f457d133bb2612bb SHA-256: c330a2909ff75365acdb6156db69d6b7646ce87b53cc285835d622f25f2f247c
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites, likely to deliver a second-stage payload. The presence of advance-fee scam lures further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://orderkai.com/uploads/files/vodozogiruwefatusolalax.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3214d5372a---nimoxusidoridareki.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9d4d9926f4a60fe809697886967c9296/pelodexebuf.pdf
    • https://promtong.com/promtong/temp/file/forufebifo.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e66a11c756---41597080599.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608724aa9cdbd---47435849241.pdf
    • https://sanxuattrucauthangkinh.com/Images_upload/files/3875815915.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/008a4030faa99f80ee4c23eda22b3243/71546887866.pdf
    • https://morabia.fi/images/file/24094560787.pdf
    • http://przedszkolenisko.pl/userfiles/file/tadunizivideb.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a74d13ec0be---76435604517.pdf
    • https://diarch.in/WYSIWYGImage/file/64666299796.pdf
    • http://seoulsquare.com/userfiles/file/bizakiwakuzuk.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/a06ac0f122dc464bcb9bd7071f816fe4/wumasiw.pdf
    • http://angelescare.com/userfiles/file/54234089756.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ba32012c383b44582ed21ca5de533282/mebel.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e9ae2da109d83a49fd27e52e7b84fb02/95377082931.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c871b41dd4b---80871182876.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54bef4107---mikokoto.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/70f0deb11967cc447ac0c83681a94967/75148310036.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e5606797d---lomizojexedaxaxemijafodag.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/7ff891ad4c34320714875717ab435d00/25817636209.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=exponents+worksheets+with+answers
    • 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_off0000da85.bin
21799eb460864cb5951c73bdc752f34eab764accb8f38a5ac2a8df18b38a1077
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 10568 bytes
font_01_sfnt_off0000f2ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16792 bytes
font_02_sfnt_off00010abd.bin
8b7eba971e5635009e0c7ba87acf8473dbed8bef49eaa9433023a1f2ef8ff24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 17508 bytes