Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc452297e0bd0c4a…

MALICIOUS

PDF

88.8 KB Created: 2021-09-12 16:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 492a80f1f359266374bf08d1387fd461 SHA-1: 6cbf64722cefbdd938f3e194748695158b8fd2b4 SHA-256: cc452297e0bd0c4a5cbb75b480a835a4859a8d8a4ded3bbb5b9f21b843552901
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on disposable or compromised hosting. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://studiogalata.it/userfiles/files/38403973477.pdf In PDF document text
    • https://artesapanaderia.xyz/aym_image/files/35810128249.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/nekogojuzulezinamuzegiw.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/202199013107052.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161397b6d134bb---vosivufajesoted.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/latobepipasufofop.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1d8db5ba9---99312076416.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/5cb4a042fdc2883ec0db7702360ddbca/sijukevodulajezular.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/62156583742.pdfIn PDF document text
    • http://starroadchina.com/userfiles/file/99219088957.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/17653363136.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/lenojobet.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383f5a3f805---xajaxokemuxuravofegef.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/kobaniwig.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/5215493474.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/61104711991.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/34889013477.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/joveguziraniv.pdfIn PDF document text
    • https://digireg.sk/upload/61665397518.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/57221774717.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/vexuduli.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/gerimul.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/tufivevodilokisavel.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/17337206380.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630962185/files/32776212658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mobile+phone+emulator+for+windows+10PDF 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_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 11256 bytes
SHA-256: 30a5b28ec0138af0c5f2205dea12060009b7ea3dd755790dfd116b742b80cf0b
font_01_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 17536 bytes
SHA-256: 57842a1eda4d45fc01a1cc176b2f4e8ec98d2e2822edaf923911d57a9bc3820b
font_02_sfnt_off00013d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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