Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b90b3dcef68fa1…

MALICIOUS

PDF

300.8 KB Created: 2021-06-28 08:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: af267908638595f6eaa7d109af778ce4 SHA-1: 30992a906e9f5c60bcab253905f5c2aa34dffc91 SHA-256: 68b90b3dcef68fa1f641ece12e5a39efae7b1011a9c03d67c67417fde40448ac
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting it is part of a phishing campaign or malware distribution effort. The presence of an SEO redirector URL indicates an attempt to obscure the final destination and potentially lure users with deceptive search results. No scripts were extracted, but the overall structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=words+that+rhyme+with+lonely PDF link annotation
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eb74b2471---bunukos.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc9c13efdc---47642318084.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/is2us1uhmdited2s2ar4j77gq7/90269888594.pdfIn PDF document text
    • http://amdind.com/userfiles/file/firovetukubab.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/puvamadepepo.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a6e913d17ac1df91d2092d371a6a2308/fexabapakipikavug.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/34625566038.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b563aabe910---73155228957.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec91a44fa---lixunagi.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210531113642175.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/rafofibofilufixemezon.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/54562640979.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/gubarotupalulareronewe.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/69ff5c14f77d3e1992bdf6cf028aa8e7/32143705957.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/48122853592.pdfIn PDF document text
    • http://skupka23.ru/upload/m/bamotugarefaxe.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/435397c4d9e83f285063bfd695ef6478/tadokutumupuwofobezokoz.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8537a46c9---pojobuli.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/zekibemudavojisugisujako.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/jolilosexeramuxoviwolijer.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/c12d6095d31d46c50bb4ec676d8f4d6d/vekolomadoveko.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/32eb19f240528e15685fd7be2d223576/23458077070.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_off000440e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x440E6 10704 bytes
SHA-256: 8eec0c574d3b68248206b09f811700ff13d334cae9bb95cc285aa138757b56b3
font_01_sfnt_off00045957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45957 20108 bytes
SHA-256: f212e5a7fa564f8eba9ccf46e9b50dc66bf6a4088d1e447f36996a23d803e5af
font_02_sfnt_off00048cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48CBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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