Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e43762279e0dd33…

MALICIOUS

PDF

235.5 KB Created: 2021-07-03 17:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: def10b0b1b756e974d82e703e85e5655 SHA-1: f2b4c6146af1719b666719e6cd638f2acef5953d SHA-256: 2e43762279e0dd3370fcaaa7a1b95dc2aca532eb74c69504766e642045e48b88
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, indicating a link farm used for distributing malicious files. The presence of an SEO redirector further suggests a phishing or malware distribution lure. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c55f0a625---kesezejipavasesoxozuda.pdf In PDF document text
    • http://bogieclassof67.com/clients/71235/File/nekubuxunob.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608145b816d2f---76800376695.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/bec2793185f9f2198a3a28bb32d2a91c/jugivuwebazijesexopukorik.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f7ab8608d---sojapuxubaxeduzuw.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608c969cadb1c---4362746716.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/jazerupexexuluzu.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/60217992817.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/44ca63e6155fdddb37d9e286f2568843/zexaralivagumug.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d0cfdcf08---kumomovirobo.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/famuxovalipixusi.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c342c7bb3---sawizidala.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ea6c08cab---23593968164.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b339e46d0654ec7182d17e3e4f6cb276/13528917578.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a5bcc1975---56787642965.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/dae113085714afbaee7dcdb4e0e4a2c8/45639884095.pdfIn PDF document text
    • http://restorationteleconference.com/clients/73716/File/42394553042.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/40475895525.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/54675634178.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b24f66f29a7---86277441475.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/vibawa.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/kgni5iac7u3rvt6km53mt0aj86/27601184675.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607084975ee15---10753495345.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac127cdd99---mojunazopimorunilovif.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57399c20b6---jejamagevajinixudunepo.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/01fa0b7f3a7ce62549229fec2a033ec3/lutevutobafit.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3c765a07b---44745639116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=promises+of+restoration+in+the+biblePDF 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_off00033f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F64 10620 bytes
SHA-256: a7263f9a0b955fd00a3407b59e143d5d0b6b240d978088099fabc82b8303ea83
font_01_sfnt_off00035772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35772 17640 bytes
SHA-256: e56c2b5149ec06299325b855d10f0c6b2a321d80a2ab4df7e16eb265df84e704
font_02_sfnt_off000385b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x385B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1