Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff59a7ad949fe1f…

MALICIOUS

PDF

88.8 KB Created: 2021-06-11 21:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 738c48eac724392a7671b073ecf3eb1d SHA-1: 7ebbab7fc09553541b4d7f12700eef34afe1d70e SHA-256: bff59a7ad949fe1fd17908583eff11465f3e792d228ffa85bd8757c026f79930
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs pointing to compromised websites, suggesting it's designed to trick users into downloading further malicious content. The presence of a 'download button' heuristic and the ClamAV detection for 'Pdf.Phishing.Trojan' strongly indicate a phishing or trojan distribution attempt. The document body, though heavily obfuscated, contains a deceptive title related to downloading music.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=download+already+mp3+by+beyonce PDF link annotation
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/65ef5e42069f7af6b6f2e5509875eea8/31191709317.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/kazedupetawebunosup.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1dce710d---37588701148.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210609/file/vazedipamejufinob.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/ade2842928ec8feef0e26e37edf7f99d/suxoreru.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/8d0755e3f858d3433f71ab70140c2b9a/jetusilipuzugemewe.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/64844881652.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/c5lrcpbpm29oi2mvb7i0av8tv0/selal.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160885d751bb6e---jeseke.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/uq50ahoh6qld69cioko1hnp03h/runaraxegenukudaxilo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/s8nsmu6q71c6nk9chvs60divbn/mekasavud.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/78d01de9c542891069d03b56ef00195c/gelozozivapuxa.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/d8d88b178090fd1ba98b685532356293/63054665745.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/0ad46ec3dfa64883ba02b8c8c9989dca/digapokewepekuxokidodes.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/uolndn3b71iq24q2hgmar7bpt4/gotodomer.pdfIn PDF document text
    • http://acril.ru/ufiles/files/xejajupepojuku.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000132d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x132D0 20048 bytes
SHA-256: e211f212dde1d533aa63a9b82014f3465c9e446bee896c3d9004e89655f5b462
font_00_sfnt_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 5536 bytes
SHA-256: 9ed0fe910a504866567917fd58d16067386a90482b3e4b6775f25b5e72bc27b1
font_01_sfnt_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 15428 bytes
SHA-256: a1958615b46d455bbded760bffade53db30609a061f963ceb5f11098d35e7d27
font_02_sfnt_off000106e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E5 13452 bytes
SHA-256: 8a2dd891c3c8a4b3cba5e2d2cbf8b4b4b6c4eebc627cf2346ae64aaee2572b89

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