Malicious PDF — malware analysis report

Static analysis result for SHA-256 f717f7624b415c38…

MALICIOUS

PDF

80.5 KB Created: 2021-07-10 09:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d2c809fd87fd977b699305173ff46e3 SHA-1: a45c325f826fe6f1b22daa4fe1d588fa90e07c1a SHA-256: f717f7624b415c3880f017161231281665369e1c49e7d283ee6ecdc9e924686c
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

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 https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608751581bfcb---7853923975.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076ed7526535---nosexobazefevag.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f57e234df6---83581631975.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6kptj964gionrmte6tnotlgan7/42085865264.pdf
    • http://csc025.com/userfiles/file/20210707002906_w6c9d5.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851559d6f6c---sedosik.pdf
    • http://www.nomorcantikspesial.com/file/duvawijad.pdf
    • http://grandinspirations.com/clients/75274/File/37837011647.pdf
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/diganajoxojatafutuf.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/144h1b9fthf9q4ppkaf2552jpg/teworunikibapibujumider.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4cdfbe1ab---melifemazuxalipow.pdf
    • https://studiovizia.com/webroot/img/content/files/1671624277.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081ab5388299---bipododivosejur.pdf
    • http://ayhancevik.com/images_upload/files/43237096131.pdf
    • https://daquin-ferriere.fr/userfiles/file/83763004044.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bd80b5d27---nafoba.pdf
    • https://aawyx.com/sites/default/imageuser/file/xutepedamu.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607237e3c5945---25273847103.pdf
    • https://digireg.cn/upload/43432969111.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3b6bdfc43---misug.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/p7k3csp240a5phrucf3lagevr9/50072931133.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/afa20f146978fac870898d2436f71292/xebobusoloxa.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/pii5b8p5n36ra6oo0cl8939619/fijebekumuv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=projectile+motion+lab+report+example
    • 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_off0000d6fb.bin
49b2fae948bfa9ccae3292a928457ba2c8ad5e26af946b103babc7850fbf06ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FB 10740 bytes
font_01_sfnt_off0000ef5e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 16792 bytes
font_02_sfnt_off00010770.bin
d81951924c8a58385e0553bf05e4f3b081c3a2ad36d499200afbde429a1f8b21
pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 17392 bytes