Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d02001d4b978317…

MALICIOUS

PDF

72.0 KB Created: 2021-09-18 08:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a568d01d33d8b3b383b7fc1baedfa721 SHA-1: b8c51b88813594b5245aacd777f78e598466f9b9 SHA-256: 5d02001d4b9783170f0dac9c3209c905e25ade22e6a634b70b0f4c24b786e358
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://medvor.ru/uplcv?utm_term=pokemon+ultra+moon+citra+download+android PDF link annotation
    • http://milwaukee.center/userfiles/file/59775832145.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/pefezibesevelalusapodibut.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/zesiga.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/mutageragudorarimo.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/firuro.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210903_4E8F074BBFD85C7A.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/56229114705.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/40458240687.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/62508949456.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/02bc8082c59277f8be4830b0730f4351/50097707738.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/mawazikedid.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/9687d6a1250de34933ffdad11dda613a/nakawobadapejefu.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/80568622459.pdfIn PDF document text
    • https://maviet.vn/upload/files/ziviru.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/lupiwed.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/48273255909.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/mifenevegamafovemufi.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/zuraradagi.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/jarapolik.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/pobanukenovaker.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/58026488628.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/61678799613f8e7240a90.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 10640 bytes
SHA-256: 19429cf9d01009bc95feb17f30e0babd3dbae9c86c9534928f39d08e2ec99fe4
font_02_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 16372 bytes
SHA-256: bc982ef607c9b4c3cc43a341ba3a89fd4f999d3642fd5267c809063049d8b32f

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