Malicious PDF — malware analysis report

Static analysis result for SHA-256 592896e9ae83ca2d…

MALICIOUS

PDF

97.0 KB Created: 2021-06-26 16:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecc9596c7da7708efcdffa06c543895f SHA-1: ac43e382179def05564434375cfad09035d18781 SHA-256: 592896e9ae83ca2d834e2a3fb506f127a3a627013c5d8b617a02fe15c39da78d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and URL patterns are consistent with link farm tactics used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://garglob.ru/uplcv?utm_term=sing+sing+correctional+facility
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/bntrrt63cgka3k998bqcigug1c/70982993963.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/4dbf5f175cb36ec3c673ae50d4f5c1a9/7966607829.pdf
    • http://www.climatisur.com/ckfinder/userfiles/files/togosomoxasitazametikiwi.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7594330c43---wugakovuwujabifof.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac8e899b18---32759888193.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7t13hho94buos3mvl4j11to1ok/kaxapuji.pdf
    • http://shopcloud.cloud//ckfinder/userfiles/files/24744185081.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609169a08e6fb---fumemo.pdf
    • http://studiotecnicoarduini.eu/userfiles/files/1565394383.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080b2882977e---11260595312.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7539e916dd---6160908275.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/007t0ht4bjjp876d46c95e0l23/29339359218.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085be075d611---jebanub.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac8d595921---93065357451.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6ad4bca2---wiwurepawexagatifiso.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3f413dc7a---99672885276.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/60d01aa0e92a87886306380418ba7584/pudopolidijozemate.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a41a4979b15---fotorigiteperonofuragedaz.pdf
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/levajixozejevewolurajisu.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7b2546554---bujusofitebozovolujow.pdf
    • http://pusancard.com/userData/board/file/55887713335.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104281935116694.pdf
    • http://hilimall.ae/uploads/files/papivopiteveke.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c736009ab11---botiku.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_off00011827.bin
21461ca72615d7941c683d383f8d844a70e6c901caed19bd753651871f17a72b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11827 17412 bytes
font_01_sfnt_off00014632.bin
968fba02f1b907c24805c8019dbe467488de063ae1ffd328ca22b3f3141215fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14632 10700 bytes
font_02_sfnt_off00015eed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EED 16792 bytes

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