Malicious PDF — malware analysis report

Static analysis result for SHA-256 d269ee92eea314fa…

MALICIOUS

PDF

208.4 KB Created: 2021-07-17 04:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f3ddd864b57b2ee4eda4ab9ff08ed0fc SHA-1: 6cf9316ccd29e5e53c05f29bd9c991abcc6936b7 SHA-256: d269ee92eea314fa40373cd2be94634cdfb939b4b52cef2f641e3ce3e16f12d0
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to potentially compromised WordPress upload storage, indicating an attempt to host and distribute malicious files. The presence of a 'password-protected archive handoff' heuristic and a visual download button suggests a lure to trick users into downloading a password-protected payload, likely to bypass security filters. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 http://kapelski.pl/userfiles/file/jafoxod.pdf In PDF document text
    • http://konemara.hu/userfiles/file/lirudenurir.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/dapip.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/444gj0r07aam92m49bra4j5pcm/84621718018.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/nagedak.pdfIn PDF document text
    • https://badrivishal.com/media/52118595113.pdfIn PDF document text
    • https://ccskin.com/geektic/files/86804170158.pdfIn PDF document text
    • https://dafelia.com/files/femowugamemiruzovi.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aff77c9974---25129506388.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/e1eqmldmb24ttmqhcs72lbb3f1/29976174587.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784a581ed9a---88114322690.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/lpgn73ol3taqbub4idj2bdrgv4/44430549996.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/18687016377.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf96ff7e390---17268019640.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0f5ecb41b30986ab7d9000ad7947786f/maminifofodejumuduju.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/490tdmnu9v1hdaio8dp2rh7714/58860657398.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/jidusekepibejuzukew.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/77608880709.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/93600774093.pdfIn PDF document text
    • http://tele-video.ru/upload/files/garezilezutanejar.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/89276194555.pdfIn PDF document text
    • http://urlin.us/1wwb6In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=complete+book+origami+pdf+free+downloadPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26AAF 18220 bytes
SHA-256: f1e9fdb8224efa8db26388608b8a4091947d15368ad24e2758d0c1600e681fa9
font_01_sfnt_off00028783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28783 19740 bytes
SHA-256: 3b28d5de1eacc81fcfb7cbc1e89a20de1d1f787f8df19cb574e65a77d5ded257
font_02_sfnt_off0002c414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C414 11020 bytes
SHA-256: 2682412be1df9782a20c11b23af7749c95042de239e726e8348820a832d9e376
font_03_sfnt_off0002dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0002f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F562 24548 bytes
SHA-256: fb01c83419e4edf31911d643e5da9d5a7de46f16fc88ebc1c3f3bf6d879d825c

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