Malicious PDF — malware analysis report

Static analysis result for SHA-256 986c1da5d2b64ea2…

MALICIOUS

PDF

72.6 KB Created: 2021-09-05 00:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d4449eb64238c5607185845112f8b14 SHA-1: 37729fae2cbdb5fe3c79c0d58d664eedbbf694ea SHA-256: 986c1da5d2b64ea26bb3a054db73a5b13ef0224b696eeaf919f60083f8608d69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://wastran.ru/uplcv?utm_term=waaree+inverter+manual PDF link annotation
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/rlb1r03matg2pj0gvdl9m0b0ot/25801153594.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/xureburekakemenip.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130733613bad---wojezuva.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/lobebikamusomipizipere.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d97488a33b---100340812.pdfIn PDF document text
    • https://rm-parketi.si/uploads/31040035102.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/3c1d85b3fd207ae0c51fced274418e3b/fibomaxavomebazor.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/41783393165.pdfIn PDF document text
    • http://caramelitos.sk/files/fugegimo.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/831faee274517d924a07aff93bc45c3c/vamedugaserumezawosuk.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/hd9pqjes4t4ee9qani621htoq7/15664463847.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817282c07a2---46025701694.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a053a556582---37448795897.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/uenagf42u9d72807k2t1irobtq/benewigogavaxapaziwati.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/suv5oisburh3thjbtjqnoeqgkj/rakezerewigabole.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7bf27e3e380e85a81e040d470b531102/69758623210.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/v4fvms35cl93hdu9al6983omq1/tamigejimuwomekekokuwizol.pdfIn PDF document text
    • https://svltv.in/userfiles/files/widusopemogagefiz.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/45539814417.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/fareb.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c601c7397---37886405475.pdfIn PDF document text
    • http://mcutech.net/files/35951565452.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/10113304313.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/71027406166.pdfIn PDF document text
    • 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_off0000baf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF3 10140 bytes
SHA-256: 53e7d5f924a813a8884e1add5e66bcfb0817ada767704d0f59aae8481f3fd806
font_01_sfnt_off0000d182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD182 16720 bytes
SHA-256: f9d69b3c1d5b775858b0413a24ce4696880330721034283e995bdcfc356fa91e
font_02_sfnt_off0000fcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1