Malicious PDF — malware analysis report

Static analysis result for SHA-256 192d96dad1eb6807…

MALICIOUS

PDF

80.5 KB Created: 2021-07-01 16:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa17d93a5d0f8044b559f3994242fb47 SHA-1: 7de0e65c0771b4c15575b8ea67e4a6808586d334 SHA-256: 192d96dad1eb6807840a21f4b3f9af70b3220495efba6ddba634408d9b5a5090
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS upload storage, likely to host further malicious content or redirect users to phishing sites. The presence of multiple distinct hosts and disposable hosting suggests an attempt to evade detection and distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160825f3f5c6e6---xuvekuje.pdf
    • http://manajrgvaaradhi.com/cms-uploads/files/84272757457.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c577fa36---15142498260.pdf
    • http://poexali.org/static/image/_u/system/files/35812403911.pdf
    • http://www.tobywells.org/media/fckdir/file/96681087403.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f36ed1dd51---89423109144.pdf
    • https://uleiuri.ro/userfiles/file/pisodokobe.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/b7b82e0bdabc2d0e5b8a34e837230bad/89271301657.pdf
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/jidoniwozifadipejine.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16201952984668.pdf
    • https://acronimocostanzo.com/userfiles/file/34832089422.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb852ffb2---96238466945.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a6u35cf15manber4uva352gff5/46413799184.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c2533a5b0---fefitozinas.pdf
    • http://asiavent.com/UserFiles/file///58448087334.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948bb7a3e0f---62072872579.pdf
    • http://reutlinger.pl/userfiles/file/worodepawofezitez.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/3hcpddvnl09i8aeo4m0padu5s4/xazoxorukatukekoragixul.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/vb96ve04jr5oubhskr1grupah5/79076206968.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2b516b7ca---43709549485.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835059a98b6---73095797301.pdf
    • http://thaide.org/userfiles/file/91183523622.pdf
    • http://presssimayeshahr.ir/pic/file/maxevorutubijujaviwosine.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=biological+waste+treatment
    • 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_off0000d784.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD784 16792 bytes
font_01_sfnt_off0000ef96.bin
14b789f1cd323b1eab9351450ae0ba8744ac405376b9bb031462a08bdba1b374
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 17044 bytes
font_02_sfnt_off00011c5e.bin
3e657b11d19b71d45094f775ea8c80eda557141ee62cf36dcebf934d6cca8adb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 10712 bytes