Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0fd59caddffde6…

MALICIOUS

PDF

88.4 KB Created: 2021-07-06 14:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8772766995f385135de3d3de8fe03c9b SHA-1: b3edb565d44d1be43a8da8e644624744c30e9c46 SHA-256: af0fd59caddffde66a3962ac5ba53df3cc3a750fcc068c1736630c07cd2c5876
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=cause+of+high+idle PDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ace51fbd6---gikaxemovefavum.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/eb8e7f7fc9596c7e7d15ebe02d8a40a4/zejemazesukin.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/70261643462.pdfIn PDF document text
    • https://brod-plovdiv.com/images/lefapofokigipodikilasireg.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/95713022868.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/jvg5a3lr4qmsleo6mqi6sgtsdt/tetisaxuxigexogapuf.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/e4fbe3df742969c59f37d09961834972/pivovedexefuw.pdfIn PDF document text
    • https://people11people.gr/uploads/File/dekirewojaxobid.pdfIn PDF document text
    • http://carsonandchain-ip.com/userfiles/file/78754146684.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/30322361716.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/21573907886.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/51491475133.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/fibugomifogi.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/44790627515.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/42791302976.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/momolorozibos.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa38b19a505---19752969287.pdfIn PDF document text
    • http://metallpress.info/files/ruduzo.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/46886936359.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8134e4f60---nosogisexabipogazew.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/97b7c6cc44692c29b1c861873c8da3ed/58417609295.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d992c06c0e---17029151633.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e95f4447c5---dogemapajufodejipuvub.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0028a4dbe---nigopirevik.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_off0000f761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 10464 bytes
SHA-256: bfaa0cd485dce7e362ef9e78d9549eaec315b0509d30c24b2d7db29ece3d31cd
font_02_sfnt_off0001271d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271D 17376 bytes
SHA-256: 4fe88ad1d8dc560a8f4402353adea9fbd9ae47b4b50882813203fb371f24138a

Open this report in the interactive analyzer, or submit your own file for analysis.