Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5000cb0c193e7f9…

MALICIOUS

PDF

73.9 KB Created: 2021-09-02 05:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e9d531c32a4ad030cc32debb0b43d024 SHA-1: 11f2bfc9e2ba84c6efaadd624ae96518afaec978 SHA-256: f5000cb0c193e7f9ddf314bae9dccfe3c08b8a95c90ffdcd7b48c9027cc84dd5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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 http://creatinglifeoptions.com/userfiles/files/fepazigijisurojokam.pdf In PDF document text
    • http://atomiccm.com/userfiles/files/46914216718.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/fokegunamonuzojeni.pdfIn PDF document text
    • http://kag.fr/userfiles/file/90568631633.pdfIn PDF document text
    • http://naviway.su/upload/files/jeneletinotapiwaziribeje.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b1cda271a---xavivog.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f5b7f0ea0---85003347629.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/nedaj.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f8578da827a---rujanevipineki.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/tujaxuborikebu.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/9ba7cb4f16ffd19295dcbc8d7fe3d8f9/77885579831.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/6d9130692df49f5fbff35bb54e7b8cd4/pexoralufojososuzatudilu.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c037135171c---vigadoti.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/9188b4d959c0db5681ec2511d3d7730d/dupowerokupuziput.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/48962286962.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/48029252700.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d3e7f522---wuzarakinobevifuw.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/2cf7e0deb3fb9457c9adbdfa25bc1930/34357616408.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/13906446515.pdfIn PDF document text
    • https://kristinanamaste.eu/files/5599875601.pdfIn PDF document text
    • http://shosholoza.de/file/rusidikusigapa.pdfIn PDF document text
    • https://theurbanthinktank.com/files/19617094416.pdfIn PDF document text
    • http://isgsrl.it/images/file/61149970206.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/forenufakawilewof.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/acfb9a66bec6c01f4a411dddbf7ed93b/62616407136.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/2318481646.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=driver+booster+giveawayPDF 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_off0000c059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 16092 bytes
SHA-256: 3f09c2378c2bb1eadcd811508de8199c1b46f46828e161e7e452da9956f43783
font_02_sfnt_off00010141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10141 10540 bytes
SHA-256: 5e5317342114dda9d5d42bfb67a81a0069f36fc782211c612fd37561f9f7ac4b

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