Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adaf2c24f8b73b3…

MALICIOUS

PDF

110.1 KB Created: 2021-09-07 20:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2263bd44f4a7c949cac561b38348d14 SHA-1: 9d4ed2692599183ed620c3ba9aed7341a0dd584e SHA-256: 9adaf2c24f8b73b3a5d6127434c652960906defa4142fec240494ec6cb19ba5b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that redirects to a raw IP address, indicating an attempt to serve malicious content or phish users. The ML classifier and ClamAV detection strongly support the malicious verdict. The presence of embedded JavaScript points to T1059.007, and the likely delivery method via attachment suggests T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gjj55c9i2upl4dnminsid0s5ks/50685843852.pdf In PDF document text
    • https://charlesstreetvideo.com/userfiles/file/fizobunezovowa.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210903195354.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/wovarukirezamekinowusujev.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/npe95mo541fs7a8v12vsna8gp1/54974488970.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/3gd9crr97odbhodmje8kep62ie/62902388559.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/37129883451.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c690c8631b0---28767735209.pdfPDF link annotation
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9a68e98492b9dbbc4b7a3f6d78b1640e/36116580120.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20762f43f---67911639104.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/94837056926.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba2e6cad91---pomisufofuvigurutabobip.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096f3e3521e9---zazakexogelumuje.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/51637372545.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608255f0155aa---dewolutusuwiwowizabove.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/53200193657.pdfIn PDF document text
    • http://calisnt.com/uploads/files/kuxexijef.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/kf4pp9j7s1725rohnum25q6fs6/juvirowefiloguvezivoniget.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/619918183611f7bcb014c9.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6c5e52aba---37033341373.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/gomomabod.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/gevakelezukelezexavale.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c0a1e000dad7b9f8ccb89f13df6f1be0/70816531529.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/26e955928924fb6d87bc21fb364c4812/96804300492.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/cogqbcgqqjhthp6q9e09nb5g76/vagupalezavezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=google+scholar+filetype+pdfPDF 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_off00014420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14420 20180 bytes
SHA-256: 982b4e01b288ca8b82c64b0d1d8768c619c9c04e8a390dfc9b7e31d9dda1313d
font_01_sfnt_off000178b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178B3 10948 bytes
SHA-256: 21729502b69a4e2527becda699da4463b0f4634848665adb0e35a9c2a215925d
font_02_sfnt_off00019216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19216 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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