Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7ee34f4b1d552b…

MALICIOUS

PDF

97.8 KB Created: 2021-08-21 06:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e739ebe7a72e569689c091d486b892c5 SHA-1: 03ece5ddeab8527234b7cdb7911e1f846c5728ab SHA-256: 6b7ee34f4b1d552b36c4eea5e6f608bf66e496a93fda45ceb85676e339ff77a9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The heuristic firings indicate a link farm designed to redirect users, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=jdsu+mts+2000+manual+espa%C3%B1ol PDF link annotation
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/38391833620.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/vewezifo.pdfIn PDF document text
    • http://kingnature.ru/files/files/68195656776.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608208a26b864---10928952389.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc54324873---kimikad.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/mifewo.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021514105263774.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/nererirodaritapoxade.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/nivilisadefemoze.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/4112325492.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/30020908528.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/kamada.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/93746300317.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/xivekalurilabufofavutulef.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/dapidufutanila.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/bulileviv.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/direzajixobe.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/f6f2652ae47c12b90a10ae08ea61a0f6/94340525528.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607783fe231e6---tilowobuxidowivadav.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e79f30d04b---nuserafovovalunexawaxo.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079428b89293---degojesikezafuguzel.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/xuvixu.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/314vdp4q6ovrrnnq4dh3s1l9am/80706956897.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/j28ihh7rbkffic6eppl6bgb0l0/27808005547.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/sibaloto.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_off0001142c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 10900 bytes
SHA-256: fa6d9c6b75a7d60c274733d3696db140b4d7ee0cb7303627ae91b236bc1ab3d2
font_01_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14545 19680 bytes
SHA-256: 514129b2a1eec41df6a50c015442977eac41d0bb2a7fd49e5c46eba46e57e404

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