Malicious PDF — malware analysis report

Static analysis result for SHA-256 70df631313063c78…

MALICIOUS

PDF

88.9 KB Created: 2021-06-28 02:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15eb8e616804a8320bd025ceee276c21 SHA-1: 384a5e848cd412c70ad983b348b4ba0ce41d6092 SHA-256: 70df631313063c78c13f27922938c6e58f2c54a9560553ea4e3db8cc6b56fb52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to what appear to be compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb48961f64---wozavufusugogesopekuxosid.pdf
    • http://ibshop.gr/uploads/_uploads/files/60482235498.pdf
    • http://microsolder.hu/userfiles/files/tuxutaw.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/245f4vjiclhhkuo9gmeak9m08s/zunegog.pdf
    • http://ketnoikienthuc.com/upload/files/tetuvelejebinuvez.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/qdeo5srncvlo4cili9gof4r4o9/69920875478.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160712998d824d---fetuzususiwad.pdf
    • http://merwepizza.com/upload/file/xibonejitixuwekojan.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7824ba7247---31843564848.pdf
    • http://challendor.com/fckeditor/upload/file/45283241653.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a88eccb367b---74846536602.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9f9970738ff32165ffb435d8a904cbc6/farajugakoxononik.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34b911127---roratujatadalopibofoni.pdf
    • https://dgaspcsm.ro/ckfinder/userfiles/files/pafisoriditiru.pdf
    • https://baoholaodong24.com/userfiles/file/90661859557.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608558f2a3339---gowijezubolifikum.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9bc104ea6---49771724359.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/31051900724.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdefb2844a---12010073543.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a47f8f3e924---44077741926.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2912b4387c690e77b21f8141b3ed13a0/pezudisamuvalu.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/7631684672.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e005f2baf---gekinamibuxiv.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0af830adca---63389068332.pdf
    • http://riskhedgetech.com/uploaded/file/109966914660c25dc5796f7.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160706efadf4ab---44092244525.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/u1ap8eju1novpn9fk1ghn9anb2/44302379408.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+portrait+of+lady+short+question+answer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f709.bin
a7ba8210e5aa47ce5940cab57f09036e85c7c8f1519997f7af63006f85bc85dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 11004 bytes
font_01_sfnt_off00011061.bin
9c9c22c9da2efb860d3e4d6d556b396d17ff7a9004aa7b3eabe1e1e841ed35e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11061 16904 bytes
font_02_sfnt_off00013c20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C20 16792 bytes

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