Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa10cb14db34644…

MALICIOUS

PDF

86.4 KB Created: 2021-06-25 20:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd7853aa8f8cec4d29a1ed8dff0c3f13 SHA-1: 34acc910266fa8120bd1d7fac3e31e752da33d92 SHA-256: 6aa10cb14db346443da861b8618a34b218a462d502ebc1ebd41fa216f0ecefd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful content.

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://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b957f8b9e09---dokeguxikakamasupo.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/wiminekozofon.pdf
    • http://614move.com/clients/4890/File/kipapokol.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/039mdnsnfv826bt42r2nhm7set/62751345644.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608807fc79f74---72550010741.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8afa1bbd5---24723737977.pdf
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/65102003227.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4026f9f767---49661684320.pdf
    • http://yonseri.org/userfiles/files/99183960168.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609552ddd4247---92822276953.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ba34a8036---wilunab.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7a34289f9---ragokanipelegixa.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e116637be67256050868cd00a2b594fe/panezaxokorefadi.pdf
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/6jefv1tjj481partnubegb8772/zedavixoxuwubutozazam.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/7222717e1efe5328a9b7b42f27f4ebf0/20189973437.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071850923879---tewusarefejumelex.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/8ddncbgcsre0hht63uia2a02i5/kominerajidobe.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/031a6074d3de18eed0a01a9570a9c42a/72131147304.pdf
    • http://flirdining.com/uploads/files/xodugiradak.pdf
    • http://rana-international.com/userfiles/files/mimirunekeralojefor.pdf
    • https://open-call.fr/uploaded/files/bulin.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/9600679f456755a3e09c7bee6cca3bed/962131722.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=bluff+house+mendocino
    • 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_off0000f032.bin
e3ed6966f8b2b78f4c9a2df6106d3c52738bb6eca797a09109f0d76993361b93
pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 10532 bytes
font_01_sfnt_off000107ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 16792 bytes
font_02_sfnt_off00012011.bin
9ceabae09d6b3579042c023a625f0fa16642dbc9a62e8784a27d88ca96164a7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12011 16988 bytes