Malicious PDF — malware analysis report

Static analysis result for SHA-256 58697a8c0d738f68…

MALICIOUS

PDF

74.2 KB Created: 2021-09-02 09:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e439fd2b0c96320b68a88135bf3df58 SHA-1: 2e74437d50e143bbaff96b5bd8d6a08a979eeb31 SHA-256: 58697a8c0d738f687a2d22f2a9acb83e5fde4e58541971d776118cbebb035574
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites, likely intended to redirect users to malicious content or facilitate further exploitation. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/84876844792.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713d2e5bb45---gobetojiwufosa.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160984050d32bf---56107991970.pdf
    • http://thedreams.cz/files/38913810698.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/e6r2tq8562a1issrv326bjjn06/lituni.pdf
    • https://service-panev.com/userfiles/44362578310.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/0b45be2a67554ae6e2e22b4fd3fc5cfa/33095915886.pdf
    • https://benhgout.net/uploads/Files/file/94002055399.pdf
    • https://southwestlooms.com/admin/userfiles/files/47267266472.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160762fd3c0359---2763214091.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc8dc090ab---rinetikedipesafunazozit.pdf
    • http://htwy.com/upload/file/viwovonalilo.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdc797b8db---jelamegadipewan.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610860b50d45b---gewekekonugaleruwu.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706fae36bca---93528129465.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ad000acc4---latejazesevakebosaluw.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947be1daf78---97331746436.pdf
    • http://wccflooring.com/userfiles/files/denusaru.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088dcec2bd79---xigimofofalozevil.pdf
    • http://happypalettebnb.com/CKEdit/upload/files/pakataxom.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/861bcdcb48b0da46e828fcebd4cbad4f/dujupirakobubudifuvugafe.pdf
    • http://vizcsap.hu/files/file/53753545982.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=position+vs+time+and+velocity+vs+time+graphs+worksheet+answers
    • 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_off0000bdbe.bin
f66cc23ad00c13b5aa365474b329cc88e80bebbf7ac81e4e658083797c5cdb18
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBE 16840 bytes
font_01_sfnt_off0000e8b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 16792 bytes
font_02_sfnt_off000100ce.bin
194f99326a9c3576d5191f5f9ed8d7cf7fcc6cc40a03c016c5e132054caf7fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 11320 bytes