Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffedd8902435f3b2…

MALICIOUS

PDF

82.4 KB Created: 2021-06-29 09:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c68d2bc0f1854438c3925dade9020fb5 SHA-1: a7661900fecf4edc2df723f91ac14f24dae889c7 SHA-256: ffedd8902435f3b2f58fd8eb07f992dd3d20a36facd4d471c18782ee93e4da48
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple links and the use of compromised CMS upload storage point towards a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/us9f6rkd1fpncn07lloucm3la7/29994512925.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/85n37ltb6c4srf01mj5jptrf3h/84976540525.pdf
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/8d4cb0be99bec84f09529a3434bf34f8/gutapejuvugozedupovemik.pdf
    • http://sjhrz.com/images/upload/File/96906102398.pdf
    • http://robertoantoniz.com/resources/original/file/84730284030.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6a33ef130---85909325907.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/2d5207c4b49a5c0309d1ff76f0271691/dirakevubofemud.pdf
    • https://anmoul.com/userfiles/file/mawogijikolaborapuva.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ae4cc2856---ribamixasexubawejusuv.pdf
    • http://malopolskiszlakwinny.pl/upload/File/94597954222.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac1ed1ec212---22878913570.pdf
    • https://groupburuemas1.com/contents//files/dexaveluxefebudaz.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d027e51be16---2303753378.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607996c2b3b87---latowemor.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72b09ed28---dedero.pdf
    • https://cottonweb.net/userfiles/file/34691045368.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adb58c15f91---madinopufamufup.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/22b590eba0ece2ef6d2edefacaa2e917/neroxojeguwa.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd350f74e73---64941238919.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8631a7dfe---simoxepirevegeramipe.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bfc48aea---wexisi.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0d7e6ed8---biwukez.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/73382562474.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=fundamentals+of+electric+circuits+5th+edition+solutions+manual
    • 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_off0000e098.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 16792 bytes
font_01_sfnt_off0000f8aa.bin
0551ce6fd7eda2d6ddbcc680af6f3666febeb4dd70f8756234d1575d5b65c559
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 16228 bytes
font_02_sfnt_off0001229d.bin
a2dc20c46a1758f1015c0c09d64650dacc241ebb3bc9244d8a144b3ade4da53e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1229D 10952 bytes