Malicious PDF — malware analysis report

Static analysis result for SHA-256 347c322bbc823e49…

MALICIOUS

PDF

105.1 KB Created: 2021-08-06 20:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 14bd13d9008627baabca81519038409a SHA-1: cfa663fb11608b87826c9f77d34878043c1f8e36 SHA-256: 347c322bbc823e49abee2be83a779de1a88d5e30f5531928aa34c5ec9ec71e6c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The numerous external links, many pointing to disposable hosting or compromised CMS uploads, strongly suggest a phishing or malware distribution campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://aliglobshop.com/userfiles/file/59417499053.pdf In PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083adae4c9cf---fuwovobikoregegerabu.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/80236565328.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/62589678993.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/4167692775.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/voladijokurikatogodi.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ee46429a75b---49498691985.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f424e841483---46818705546.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/b3d5f21994b881403e12eb1c424eef65/53247881201.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/66qggiog924uoahhetvf882j32/10886754541.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/588529068fb6653bfd1fc469b127e68c/tuvaxik.pdfIn PDF document text
    • https://afayl.com/userfiles/file/wofebar.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeb0f2f016---97061612360.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f495e82e1ca---mebamo.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/savawuzezutagiwuz.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf4404a2c---tugen.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/5120pii19hamek32crd8cld18q/pezeru.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/256ae85f6f77c84e252e5c6cced74db2/fulapawejiridifemuso.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0cf6ba790561fb07ddc40e5b834765ad/14289989967.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/jowafovojoxatabojemi.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/1d56473ede8d3f0f753207d438abd33f/81440091581.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jtrbom4vuu3ghe3nn3aaqdv666/zuvinunukomeraluxirikom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=equivalents+of+the+riemann+hypothesis+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A1 20980 bytes
SHA-256: b4556465e2d01277fd8c818749e48af6469b46a534f04611296f7687d75890bc
font_01_sfnt_off00014cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAB 16304 bytes
SHA-256: fd831f8a239d989b17d634ff15357c15abceab4494fee6227fe5cb1b70c826aa
font_02_sfnt_off000162cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE3 11172 bytes
SHA-256: 8676a4ee1d14385c09a0dfbdead203fad9579eeeb6ffe9e836585e20ecaa57a3

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