Malicious PDF — malware analysis report

Static analysis result for SHA-256 445706c95622f54c…

MALICIOUS

PDF

90.5 KB Created: 2021-09-06 22:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: baec6b8c53de322f553327b869aed156 SHA-1: 1ecbe35713b2450bb16fa46223d3189bbf0edfbe SHA-256: 445706c95622f54cf69cec092dd87fc06aa1db48554ff08de52519036d909cd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting, indicating an attempt to obscure the final destination. The primary function appears to be redirecting users through a series of links, likely to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://ukrfirework.com/images/file/77972051329.pdf In PDF document text
    • http://vivaibonomo.it/userfiles/files/xigedamekipatokibimadawil.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/bigalozevijedazik.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc24d65c0---bofunazazajusa.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/gatupusemugejufubireduto.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/vizoxig.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/32122286433.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93a16af2d6---xodonatefuvatovaxase.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/99912358363.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072bd71a6259---83912941736.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/zolapudis.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/c67e56a5694dcc22d7f363dba2373ff8/18763967126.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2r6affrhjlptmdgp2pslgim195/gebixe.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/zurugikezopig.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/2q2s0t3m6tkts559nejrb21rna/wovovutajubi.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed4290e9f9---wuborozekakivisafetij.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kmvsoqtgpah7i4bjf2jc5f8fi6/bamiwivejiguriberibiluza.pdfIn PDF document text
    • http://premo.at/userfiles/file/pulaximijaxivugev.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/bekivumewipugufezazufe.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/30047474759.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/mufajaxipe.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/79e93f9ef93342dabba29ea49d49ac91/33800526164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=microbiology+book+by+p+chakraborty+free+pdf+downloadPDF link annotation
    • 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_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 17728 bytes
SHA-256: bf839ef2d983ce66c5884578e76211468486fa10e4d4664c5db402998cec3f44
font_01_sfnt_off000129be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BE 11156 bytes
SHA-256: b57b28820e1b4846cff695ed0b5cdf3689bd95dce0b14fea60c8feb0c7adf814
font_02_sfnt_off00014370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.