Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa14b073975ad08…

MALICIOUS

PDF

87.0 KB Created: 2021-07-04 11:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b010711fc975ee5cb8124421b69a393c SHA-1: 558a8b16addcde869c3af3e7f70a3ffd779b4395 SHA-256: 0fa14b073975ad08db46644e602a48d8ff1f36f715a0d53c2a18cbc265efbbee
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the heuristic findings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fh04ibvb56kg59p1en3rrh630e/38601587811.pdf
    • https://anthonygillant.com/userfiles/file/xuvusojajiwudejowa.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070432c0cfbb---fasasepub.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/3fd90e9299fc32c413ce3aa482f25b65/41853756620.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608300a7c839c---85223912876.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/1dec858f202f67b1da5b5004635044a0/tisazonogokokixe.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c53cb036ae3---munemo.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/d28d13bf2d90ca19503f3df4f16aa876/ridosejelikem.pdf
    • http://www.jindatunnel.com/up_files/file/waxagorovikibudolexav.pdf
    • https://mszukam.pl/dat//file/6969151034.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/bb92674d87fa56118257b1a841218850/57243330334.pdf
    • https://resonanceacteurs.nl/userfiles/file/zisomofolusutujosifovota.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3a6a3c02a---41048925513.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/07fbaa327a8c3f7ddd961f8e39a68a46/kazilofojomalodur.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/635ocqbsfcai69dtpm3jpqjs5n/nosir.pdf
    • https://menu2uplus.com/images/file/99882875614.pdf
    • https://vildmarksjagt.dk/userfiles/file/xobubivoxetadupugirigogib.pdf
    • http://anandtouristcorporation.com/uploads/wazidurejawugibupotufeba.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2fbc42f4c02f9f2126b67264a3a95004/dewesuxelewopovowuvexipor.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/4fae3f8d40fd94225b83c545c9a955da/48708794207.pdf
    • http://koreaseowon.com/ckupload/files/dagogoditufivok.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/745773cb3191d58339033be7772dd483/406450735.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07e8267c4f---gejuvefubibugelovupa.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a83b5b95156---sujozulugudareted.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/57a861b6fcd55dc155ecdfa2f47f44e8/lisinixux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cleaning+this+gun
    • 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_off0000f1fd.bin
5fec92b1fbe20e2e0b2c7995f7f10f5daa5a1f5997364b8783d29fe6b6ab2012
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 10296 bytes
font_01_sfnt_off0001091a.bin
a78287ae3b2bd834bc58d47ee407787ef29037de4b2be053f2c2966d312e4470
pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 17552 bytes
font_02_sfnt_off000136d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136D8 16792 bytes