Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5090f92bf33c6e…

MALICIOUS

PDF

93.4 KB Created: 2021-06-30 21:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e610e9eec9d1986b0ef2296537b191c9 SHA-1: def85e3a1d6a2b0a80a2fdb51ff4fb2f15248525 SHA-256: 5d5090f92bf33c6e5e3460affd6799b07f5f9385095a5b9b48fffec3bc7f36ff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The presence of a link farm pointing to multiple compromised WordPress sites suggests an attempt to distribute malicious content or phish for credentials. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47ff573d5d---17599105442.pdf
    • http://comp-art.ru/userfiles/file/80212216405.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b40a944c652---vatoxogajolesapununipa.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609be7451c707---99233623070.pdf
    • https://maggies-handmade.com/UserFiles/files/47387827307.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799d486b703---nabogubuxirikaxuvabex.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/f38c8a7cfc2754a4e9fb4880dbda60fa/10238144893.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df70f510a7---kabufazatezojokerexonipop.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7gpnm63a091dmii8jgukrr18tv/51996488892.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607816fcba00d---votis.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d37aca02ac---kegitetiremalenazoguvak.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bed964820ec---fewewemezenevefanubirubav.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273a35532a---modadojefapuboxijonebe.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160740ccec5919---8562108274.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/2d576cc1273e3379e91521a90b453df0/nobukugazoleg.pdf
    • http://www.gabrielamaciel.net/images/content/file/zevapekulegapilomosubiba.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/840d4109bedd4e2f8a51c98479697481/kevofefamibola.pdf
    • http://mesterek.net/tmp/welenavibutatasaj.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe4a2f2f33---suvobukusagexa.pdf
    • http://myconnect-thailand.com/image/upload/File/53049931947.pdf
    • http://v-lukomorie.com/uploader/files/56084792178.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=flash+sonic+game
    • 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_off00010da9.bin
7259e9dd43d20840e320a4157902d8b617ebf2438df4af6cfd1b3ed887af58d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 16724 bytes
font_01_sfnt_off00013914.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13914 16792 bytes
font_02_sfnt_off0001512b.bin
c082785d4f3a367be4ba3d5debacb7aa996190f149bcc0f647f949fbd276b10b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1512B 10456 bytes