Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abe377f5829f9ea…

MALICIOUS

PDF

94.4 KB Created: 2021-06-27 01:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce306798b99767f651a8b3d089bc3f91 SHA-1: dbd12f26a899ac28d81858fe45b54ca333a9668f SHA-256: 9abe377f5829f9eab5485c4affb6bc3e440fcc27b0b29140b50abd2e3698c5f7
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The embedded links are likely intended to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://taikenplan.jp/ckfinder/userfiles/files/67668336828.pdf
    • https://stancijanegrin.com/UserFiles/files/67452674839.pdf
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/nikaj.pdf
    • http://automotiveenergy.cz/userfiles/file/74363190976.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5c33c247c6933665a7a2d73e4c10e27/97195675532.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c18848ad1e---72243469361.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853bfc6eb45---xetodetasokat.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7c4681517e9230e7f5737923c9fee1a8/90252694564.pdf
    • http://tutek.eu/userfiles/file/nobevuxegiluziludenexe.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/e51f7b3ee74194595a80124d9effd19e/52982130349.pdf
    • http://bannails.com/fckeditor_userfiles/file/12104878436.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/2tv28emuf9qreib3dv7vpv2471/turuteluwuril.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5517ea552---fefiw.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/3cdbf009cef5b766a3b1a8fe394119e3/38206360071.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-6-26/20210626045507732663.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1c2268ea1f301a8be3affb1a8b34d205/bifawak.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091d61740def---68589241378.pdf
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/39057623240.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/81f845e8f55808f212f5861901012f31/50304006966.pdf
    • http://bawaconstructions.com/editorData/file/20499153665.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16074d3cddfb48---panojuwezufe.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/bisizodu.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/dec477f03f86c2b73edec47c288fc254/5470444903.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/c72b9bd9633c4cd3c2a68306251d4c0a/18114590174.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+say+curse+words+in+roblox
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef43.bin
263fba459c43ef75c575ca363a77cc798276f4a347a51b0e06021682a2b3c25f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 16700 bytes
font_01_sfnt_off000106c2.bin
0892c40dc27e712a87c4544506ac5f629e5fce7eb6eac827a3a66768723558f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 19424 bytes
font_02_sfnt_off00013a6c.bin
0db27a9b8048cd64108a674573e2ac0b3b18ecc67fce014f7b4d76da475cc27a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6C 10896 bytes
font_03_sfnt_off000153d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153D2 16792 bytes