Malicious PDF — malware analysis report

Static analysis result for SHA-256 35717ee9eb0fd9d5…

MALICIOUS

PDF

69.8 KB Created: 2021-09-07 10:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2d47a6d6e3b36646129d9e331005924c SHA-1: ebc5eb7e81fb22e692d2f1dae05d9200db63ada6 SHA-256: 35717ee9eb0fd9d51990aeb0dae95de7e2dfc150aaba3e8c1d2caa774ed5c3f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, directing users to numerous external websites, many of which are hosted on compromised WordPress installations. The embedded URLs suggest a phishing or scamming operation, potentially aiming to trick users into visiting malicious sites for various lures, such as game-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://crewmak.ru/uplcv?utm_term=how+to+get+lspdfr+on+gta+5+ps4 PDF link annotation
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7d5c3f813---33042948258.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072744e0ca8d---16243714934.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/memasoxelajizemapide.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/s4mer07u4lmueq92ok98sufnck/47661439385.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160d01e7492d8a---25844689293.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202108231509276201.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0rb039of9ce8kn67jk4to4v748/pafiwepasibonaged.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/80093825941.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/168dfdda2aa10ac3eeb9638744829f2c/18556720150.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc2d45f4a---39099625228.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a3d5d5ecf---tujisoz.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607207e685d9b---powovesojakudopuja.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/seworaxeluvot.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/mozubekefutena.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/62144906235.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/hbuiikrsn28jcinbqq1n0a9mj3/bugupukopotumo.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/kabezin.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c281cd592---75265512556.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/e167f44dad007bf528322fe499c13634/41023824538.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gc24b3obd6e450r75dco7srn68/425910382.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/h5lr5idkd1d2pa9jr10ejsc0c7/dugoxogaxifudu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB472 10872 bytes
SHA-256: b7d70b56ad6bd4fff6187a0368df4f3b2d62381e1dcb32d82a0c7225ae984284
font_01_sfnt_off0000cd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9E 14312 bytes
SHA-256: 363a8ec368f0825e7c376ab688579a9d9b6e70a25b6f8b0f570fe800ef3eb0fe
font_02_sfnt_off0000f177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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