Malicious PDF — malware analysis report

Static analysis result for SHA-256 9821959af14dd10a…

MALICIOUS

PDF

78.6 KB Created: 2021-06-22 15:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bba720aeef7082ee377c714bf5bd0d9a SHA-1: 267b7280e7be5a85b31ff19542469993dd277fa6 SHA-256: 9821959af14dd10a6d343b4870ea51558f0850f3be4e953387636dc4bec4f070
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting. The document body, though heavily obfuscated, suggests a lure related to obtaining free items in Minecraft, which is a common tactic for phishing or malware distribution. The embedded JavaScript likely facilitates the redirection to these malicious links or the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://pixomot.ru/uplcv?utm_term=how+to+get+free+capes+in+minecraft+java PDF link annotation
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4cfd75501---bomizufaxeketosobi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2op3pqojuhectqttnqkclitrut/53090964925.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/71028077695.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c79467a947afaa56315afa2aa1a4ea5d/fitinosepofawunujadapo.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/75097980895.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089f7b7639c0---tonume.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/sc9lr03q3l6qt9qrg1cp2pb00a/93702372776.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/1g98bhd5to82q6ooecqd979gu7/javitoverukiziwugumonedo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085507d405f2---rakokunobisanixazivilogo.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074206e41799---77965019987.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/fded6f15ce3c34b8033af57bc321da60/vodakokexu.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/85610395283.pdfIn PDF document text
    • https://stopserv.ru/files/file/10166782513.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/58898627112.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/zavabar.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b3321a05a2a6341fdff1cd587726cc23/96956485315.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/054o8ih14t00om6fkime5mipoa/sekaxajefed.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56a0fab0c1---84409792917.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 5492 bytes
SHA-256: d97f8ed10f7530a1a55d03f405409826424b9a3dfe57a6092d5d62a336a12ee3
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 12188 bytes
SHA-256: 313a9c6b8606478ee9a01b73e12d2126d63564c6770734a1358c46be7e13e478