Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db208c11f161829…

MALICIOUS

PDF

79.0 KB Created: 2021-09-01 17:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7f0eb910ed9dc6201f2ba06cae20bcb4 SHA-1: 5d03de63add12468e3c1b1f5a6cad093b06acfd2 SHA-256: 2db208c11f1618298b60cb8d62e69897f72928b4630698c15d6114275ebcd7d6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The file contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of these links and the overall structure strongly suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://www.derbysignandgraphics.com/uploads/file/23657588326.pdf In PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/dvcttg048es69biitten1nr5da/24585424543.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/9212715319.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/29074390597.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be461788943---11399413181.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/23719782641.pdfIn PDF document text
    • https://bachson.net/upload/file/xeloziwipolezuzilofepowi.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/moxibap.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/40386990375.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/42769711519.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088aae551e2e---55187027914.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/2ed845af202d1055592e11e271cd20f7/pokepesozorovunufibigulux.pdfIn PDF document text
    • http://xtra360.net/campannas/file/tefabujisisikawojoferi.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757928af477---visusimenutikuput.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/xetavizemabotivaluvek.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/63035714997.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9efb70e23f192024f15cb12c1cc0680d/nuxipemekatiwe.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/56303736374.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129c77f80ef2---xilejikufuvezo.pdfIn PDF document text
    • http://yejida.com/userfiles/file/ximiwarumotifasevozikapog.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/96421214894.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/11415035006.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/40563599038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=cnbc+direct+tv+channel+numberPDF 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_off0000ce83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE83 18028 bytes
SHA-256: d91c11df5a4ad8f1917bb4f4440a766f211a0b12bc5bcad9d6d76e78a330ead2
font_01_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11578 10684 bytes
SHA-256: 6f3c08715c6481b6e245d8729a93b82803e50f27384019bed9932d56c4f6d761

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