Malicious PDF — malware analysis report

Static analysis result for SHA-256 320c6562e8871ec1…

MALICIOUS

PDF

87.5 KB Created: 2021-07-30 04:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2bccfd6fb9f53bc76fc4c167517ec10f SHA-1: 0c53c6fed6584583e4527505e54a494c86dad09d SHA-256: 320c6562e8871ec153520c659695e9ad87e6cb8253379d31de3e387988770732
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various URLs, some of which are hosted on potentially compromised CMS uploads. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to funnel users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soudurelauziere.com/upload/editor/file/fofiwupojebemazazizuzos.pdf In PDF document text
    • https://masihpt2.com/contents//files/zazeviguz.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccc6870ceb---94225653493.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160f672f507494---9170026110.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/latevuzazixanapajizovod.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/vedazapuxitaxopetu.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/loluboleraxigaduku.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/50440302034.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/2188001234.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/37157890011.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9ef27039e---zubimewifet.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210705_6A8AD58FD89FB37A.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/tumokora.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/lasusolevumizufewokufo.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/18109347697.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d94e48286---9862340712.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/0c54a0e1451e6885c1d3b545050463dc/88494678328.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430050023437720.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/vubakasodunoxer.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f2c5624e2---juretunubowexixemowavuli.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021052214542431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=rick+durrett+probability+theory+and+examples+solutions+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 18760 bytes
SHA-256: 0abe4751e18c65a4fcca765873bb7ae934baed920301ebf20cd2407a32b0ac90
font_01_sfnt_off000104db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 11476 bytes
SHA-256: dfa799aa2849cbfc27b1248fe8a980581f8f5dc82a62d728a8b5734bb1ca8b09
font_02_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000137b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B3 16072 bytes
SHA-256: 7f8840a058dcfb9660f44cec4853168ae481cc07a8525183bae2c8ad4d13d467