Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0e490a741cc2a9…

MALICIOUS

PDF

87.2 KB Created: 2021-07-04 07:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3992c9fb2e50f8566cf0fec4bab062df SHA-1: 4657ee89cabd704ad140b09fd1ac0e5fad967335 SHA-256: dd0e490a741cc2a98f76547cc24d904cccf283cec8b5d4f1f953d552c302b97c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/49f0fb635f1912e2ab2c879ea52e7d3d/mojuw.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/117e041dceb6537d81f81bcc773d032a/75286767891.pdf
    • http://topoint.cc/userfiles/fckFile/20210702032848.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093b67e6e21b---56769933024.pdf
    • http://vieclamquantri.net/upload/files/29204318123.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/25537879787.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071b69c23caa---21213256177.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c19d66316---lodidewuvatex.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff59495377---12723605557.pdf
    • https://zebcom.in/userfiles/file/juzugewolawav.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/fp5qfo3k1t12s5vo85f6njp76v/xuluwiwikowejekivagoxi.pdf
    • http://sotel-perm.ru/site/file/livigeju.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/06e57f4e53d3570d70970ab6ff7e61a4/vabutipidaxeraxokadipok.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861292385fc---55244379480.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160762776a4226---gegufavarobuke.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/0873dfe013ea10e1a34cb558bd4b8c53/15461705392.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/0c36e56ff860e7d715fe309efef91bf3/vuturivexudo.pdf
    • http://telekommarketing.com/firme_data/files/5928071275.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/j4r5m8sfj9ssec0tl7hmdcq6f4/folapuvu.pdf
    • https://angkorphotographyguide.com/userfiles/file/raximuzozotiku.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607936286b99d---siziwugopokafesu.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b484dabad---82293429904.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be0fbaf114---13421282257.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160bfade2e56b8---90531257443.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ilr11f4a05k46teva88sjqk1s4/sivozetobitosigogulewik.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b56a9cae732---62239493919.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tangram+puzzles+and+answers
    • 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_off0000f22d.bin
fcdc179b5825cfdc0187c8461efc2200db01bd590df8f94099a84f6ebaf515a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 10636 bytes
font_01_sfnt_off00010a63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 16792 bytes
font_02_sfnt_off00012275.bin
4de33e7cf5e42238fc6d515625856a2672250fadad2449cabad1a9729ea3867e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 17168 bytes