Malicious PDF — malware analysis report

Static analysis result for SHA-256 46af1f04abf48904…

MALICIOUS

PDF

91.0 KB Created: 2021-07-05 15:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8f48a495a241882781cb0101321ae66 SHA-1: 2d71f54e20113c3d9c419a29a41e9f9719775feb SHA-256: 46af1f04abf48904fa1176761479740ceea159caf5fdd0fe1b9f94f398647b16
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to lure users into phishing scams or malware downloads. The presence of external URIs and link farm heuristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://pistant.ru/uplcv?utm_term=pacemaker+and+high+blood+pressure
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf50ce4a76---38288631178.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/41cb50ddbf74f581359a6afc1875c349/41776947207.pdf
    • http://dinskayarealty.ru/media/file/gelozasizupaxofejinabizev.pdf
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/voxowamijew.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/362af86a5f97bbc8f94cd23e6cf31923/81832519757.pdf
    • http://quick-thailand.com/images/uploads/file/91508655925.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/3280696753.pdf
    • https://ptogel2.com/contents//files/fomide.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/9514424899deec53c803d20b69fd2bdb/sosiwibuk.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/d8a6e835fd31932381afbbee827c5fd2/segulopiregorura.pdf
    • http://planbmedia.hufiles/87956579091.pdf
    • https://tiklatakip.com/calisma2/files/uploads/vogekixirex.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/rukenevoluxuzaxaruranovit.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/0896e9e7bb55ba04f060029fe792a75b/foxepeter.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210624031853.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098fc3b17d01---lutigibofewi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846ac8df79d---14835205838.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d13452646---1584660455.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/833595c7b17ffe72d31a990bfdff4922/mixifebedor.pdf
    • http://aimic.com/userfiles/file/86582549478.pdf
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/mavugazuxa.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/88d2af00b3e86a5fe9e95dd2df1cc9af/papowowon.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1dc29c7a8---50701406403.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/26047266138fea8db34978dde5e21d1a/difuvizepulota.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16072d47bb3574---71038857385.pdf
    • http://manavpublicschool.org/manav/userfiles/file/wepamegabubupifatu.pdf
    • 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_off0001006a.bin
87f38752001fd73b6d970d4f8de39a3ec97eb73dbeebf28f1a3a8d0ccde3e233
pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 11196 bytes
font_01_sfnt_off000119e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E6 16792 bytes
font_02_sfnt_off000131f8.bin
0ae652e4219959638c6cb8c8021caf8dd2f6d07ace008fa5e0dbf91d2ee16c1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x131F8 17164 bytes