Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5ab24ebebc2294…

MALICIOUS

PDF

102.3 KB Created: 2021-06-27 21:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abaf9100da8bd9672d2314a2bf35cc3c SHA-1: e4cf1a74c6670375aaf6662f43207071fad16dd9 SHA-256: 9e5ab24ebebc2294a663d086c63c96dbd42dedfdaaf54c2f9162b58c1f79c583
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate the PDF acts as a link farm, pointing to numerous compromised WordPress sites and disposable hosting domains. This suggests an attempt to distribute phishing content or further malware payloads by leveraging these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 http://www.vikingmaterials.com/img/dinakowamonitogajar.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dddeac049c---vuzimuwi.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076b4ebe2b1b---ratarulutojitixepad.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c340a37b0---95164437822.pdf
    • https://isosklo.cz/uploads/40262895630.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082798add1c5---1057384340.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787eafd3d83---puzoduwosasawikebe.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bcd75a72d---giledobuvobefijaxejalani.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/rll8dvpk676gseq772c55s4qkv/5462030115.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160882b2e6169b---78374079234.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/d3pfsntbcecld9fropjbh53s24/46120410312.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607713ec8ca42---ruvir.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160870166c9644---jozirefozubebolixijo.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747c089033c---pivul.pdf
    • https://organicfertilizerproduction.com/d/files/66149896320.pdf
    • http://48bulls.com/js/upload/files/26911374150.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/0f6ea73890599225bc3053c5b2bb76ca/nosimenijitarogotegal.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab02f2755b4---60565657723.pdf
    • https://creteotels.gr/FCKeditor/userimages/file/bizaw.pdf
    • https://rybczewice.pl/userfiles/file/fozonesoduborema.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ee2cca63379bc6c67a1181964c2a4425/lowanijimafiju.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4c1b013d3a02ed92707a0603c92302ec/falune.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=vale+middle+school+article+of+the+week+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_off00012bb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB1 16792 bytes
font_01_sfnt_off000143c3.bin
058c1b88d4453768e354363c4a20b65177596d2d9e19fc38a7339ec3dcba3fac
pdf-font-stream PDF embedded font (sfnt) at offset 0x143C3 17932 bytes
font_02_sfnt_off0001729e.bin
fe6183dc2599c366a3d89a5027bf08719aad5e1bd39b59963fc8d80eb13e8b56
pdf-font-stream PDF embedded font (sfnt) at offset 0x1729E 10888 bytes