Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a479fb7996d04f…

MALICIOUS

PDF

90.6 KB Created: 2021-08-13 05:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6100b9f6f8a6a3cc1b0bdeeb89f8053 SHA-1: 58a5c706dc7a0d270f38337c78717dc0ad01f7ed SHA-256: 60a479fb7996d04f133aa7333b04fc91ebd3a2905c0779e340ccb68ce69592ba
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links pointing to compromised CMS uploads and disposable hosting, aiming to trick users into downloading potentially malicious files disguised as remote support tools. The presence of embedded URLs and the 'Remote-support tool lure' heuristic strongly suggest an attempt to facilitate unauthorized access or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ajivikafinance.com/userfiles/file/56314675996.pdf In PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160820de8228b7---xenuvul.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/161102e8fd2b4d---gipakoboguzobuwuloritexi.pdfIn PDF document text
    • http://yuha.be/_files/file/jarotinafukipaxaneg.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/13256483036.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607995fe6eb76---rutitifuxaxebogebolep.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7d2c7a0b---53313728192.pdfIn PDF document text
    • https://cmf8.ir/data/file/73925290305.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/31079567486.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/6305397976.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/d60cuvv7jopm3tam2sqihujle8/38255905944.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/wopuzemimenugiko.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6ccd8264---nidenogurajeko.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4111cb017---damofiw.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a09835ccb5b---pijanogekoloxavovule.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/59374764788.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966d6569fc3---kojomufotefowukona.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/saxoduga.pdfIn PDF document text
    • http://school15-tyumen.ru/f/gidovesopojujaxujuvebuja.pdfIn PDF document text
    • http://techhssilverbuffs.com/clients/61416/File/galujatokololenoxagu.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/43dd0ed0378d1ad45f41236c851b587c/sozovawugil.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160946c2d60e73---41234821668.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/31639207123.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/816001e1cd93255001473a18400dbd99/zupov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=youtube+peliculas+de+accion+completas+en+espa%C3%B1ol+latino+gratis+2015PDF 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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 11716 bytes
SHA-256: d740608cae5141bc359407c45c06f5ee45b09228e05388b7bdf05a73f382f544
font_02_sfnt_off000129bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BC 18544 bytes
SHA-256: f5d48d551b76edf8511673c7cbac2a1670c3cf47a8c9cf2e7e8333fb78e3c2b6

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