Malicious PDF — malware analysis report

Static analysis result for SHA-256 175fcedbec718d3c…

MALICIOUS

PDF

87.3 KB Created: 2021-07-07 21:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c36b5d47e0c4b536ae07a669e3843bde SHA-1: ee45dbeee8d94902fe510ab3500fad26b3b1958b SHA-256: 175fcedbec718d3c767f376ce0a513d83a720c7e1f6bcfc8cf552fa4ba3e4730
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites. These links are likely intended to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4f5d051dc---nekabomifineximavodusep.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7b9a31cc---14276435250.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/3esd95ncqti3ifaiascfnbl6bp/vonigumidozuxobemojizenop.pdf
    • http://progfin.pl/userfiles/file/gekuwulafawameduloxivu.pdf
    • http://amsasecretariat.fr/userfiles/file/gizogopuvanaxevaxoniboju.pdf
    • https://contabil-fiscal.ro/mm/file/raserawegudepijilor.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a6f698003627e23772ae204e737b6648/92980928218.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a31edf2d424---73429968136.pdf
    • http://dungcubepgiangtrinh.com/webroot/img/files/loguza.pdf
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/e3d8dbb84d11b7a00e7d1f08a2d81a9c/sozikimemunibigemebu.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/40738898416.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf50ccf5d---25946148787.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a471297ab78---sijuvoveraxoduninula.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/65065fe895acf84d6c53f9ea8d589df9/birezagudetasogisug.pdf
    • http://jhferry.com/data/fckeditor/file///muwatedew.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1cnu8770q0clsjrvged5gk2pr1/1587050109.pdf
    • https://festival.bg/fckeditorfiles/file/37311729395.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/0976cd7d56f83be77f92279b7d237cc2/13700927830.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/8c107fe5cce76409aaa9b0000f9eff1b/juxowopisamalanejit.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8d2a94a4db0ebee427609fd42b734b57/80751194647.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b8cdf495e593dfdfdb6a15d442908764/rerutonadawivabib.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b42256a0d82a388389dd1ae25b54593a/wujiwidejanavazabewozenel.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=praise+songs+mix+mp3+download
    • 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_off0000f1ef.bin
16defe116230d4b320283d0349af67e3e9d8041303b45c50d0d74fd777c18074
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 17096 bytes
font_01_sfnt_off00011ec3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC3 16792 bytes
font_02_sfnt_off000136da.bin
51ae4c9d37be4711050d7ade57a5c68d12346ae53dce7d1fbcdd69d2a21a36ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x136DA 11000 bytes