Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c7968af623e302…

MALICIOUS

PDF

90.7 KB Created: 2021-09-06 12:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f138321e5700f82e84a225eb254519c6 SHA-1: 514285edd6bbb21b3e1f64c1bff4194a0ed779fb SHA-256: 62c7968af623e3023491cbc05ece6449e2a49770f492cfabc87571ddf03caa0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it functions as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://irantruck.ir/data/file/zuvopageto.pdf In PDF document text
    • https://dalycity.com/wysiwygfiles/file/parokozenu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9ec502d88e5ed1c9d004700db7ed2f04/31634277888.pdfIn PDF document text
    • https://labelmarket.eu/data/file/45799150388.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210830_154945.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/38800749486.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/feddnbn13h8uo6je8612m8lst5/konivinojalemoj.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/62791662236.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9a1b1c5fc---56817277003.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/rjtuor33i0elsujrik42g66s8s/revawibibodekowo.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f58a4d73be98b3a3f9d6a2a2e90572ca/78023517728.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161297a5529486---66884067836.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/rotubetukoverudo.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ni12rj1nmg9efi098gji742fda/10453769628.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j8tmp969e2jo2qgqrlnqak7j6t/bujumikubovuvibonapugixem.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/99180907639.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/xaxugalebapinilabag.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210716_5552793FE55C5014.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/67338719435.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9621d09f2218c7159064839736cb7396/laled.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/dakuxus.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/jajogozuwiveturanuwo.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef4630cabc---pimofasipelub.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160876e032e404---sibokar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=planification+familiale+maroc+pdfPDF 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://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/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_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 20308 bytes
SHA-256: 3e4abaf99e55b3a70f92e38a5221157152d47bbc399d64dd5ca1b4e5f8c6f6c8
font_01_sfnt_off00012cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14506 10616 bytes
SHA-256: 74bb3c9ee1c6e6a4b3c6e4a6b1dcca1e403ec340967af483901e69ca06f44d87

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