Malicious PDF — malware analysis report

Static analysis result for SHA-256 09896c09e0a55d15…

MALICIOUS

PDF

86.4 KB Created: 2021-06-29 06:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 949b58ff2067764158f98c0f5d76a352 SHA-1: 6c381bc6ad60721504648897cdaec3582732674d SHA-256: 09896c09e0a55d15b92f03e784edfeb88e43f845c7ae08a50764a95b5720e01e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to exploit user interaction via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://giverny-bkk.com/upload/files/10769688446.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/19876cc112ab169dfe3dc2548d720540/60849516931.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/jdvbrkldtotlkk5nntf7oh4gf5/kebigonadapiriseb.pdf
    • http://reunionclass.com/clients/7469/File/73621049175.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6a799416d.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b4e0982cb---solurezadoned.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7e16c5dcf5a9e4e32ba1e317a7d3277d/donugosurag.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/37624030ddba73d28e2a85bd736b0dc4/maparotuwo.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/74fd257c73c2b2e40e1b018d8282536d/69492614542.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/973145b9f0893a1bea8414181218c37d/34054164083.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/5067f0440c2a321b7bac4f543104559e/vifafosawolekifidivinofew.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/80f43bd2efaca124a487f23c8c2e3c9b/wenaruwogazofafolebopeb.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160812e4894c52---67278274934.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/grofvrsdb574o42mcgl67lvor2/70935643430.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607181dd299aa---xelaragituwelubi.pdf
    • https://jotelek.hu/files/file/nopolofopukuzosuluf.pdf
    • https://aronabritcan.com/userfiles/file/84324163789.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16098832311c67---sidiwowubepi.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/252gktjsq2cjbv378h9lv0rvl5/nezumexazegivazomu.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/72342cd411729fef5ee6f82aa1c5a36b/80837901495.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98ef7c3aa---7147970948.pdf
    • http://stonebreaker.at/viligapakemibif.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb5936b02---dapugokezopolimesule.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/0f2ef04c6688328399b3c2bdc8d73965/xotasa.pdf
    • http://aven.su/userfiles/file/69979198187.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=relationship+self+care
    • 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_off0000ef39.bin
8df753408eec03f4d0b64afac521727f83af8c77a54c554eac9459d388979716		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 10624 bytes
font_01_sfnt_off00010772.bin
80fecbc4104acfff9b6eed02a3f3a059460b16763da0ace55bf0cb1f980f4a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10772 16752 bytes
font_02_sfnt_off0001330d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1330D 16792 bytes

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