Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3a605170f08094…

MALICIOUS

PDF

77.2 KB Created: 2021-04-02 17:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f93861847add3903e511550b52b7a30e SHA-1: 568b248967fb57af3f97fc89e7552332e5449cf9 SHA-256: 1a3a605170f08094276b822e1368b8aa30ca13ecad90c0a1d9ef270cf6836485
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including those on disposable hosting, suggests a link farm or phishing lure. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into downloading content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=the+art+of+seeing+8th+edition+pdf+free PDF link annotation
    • http://gidujoluj.mypressonline.com/agile_methodology_tutorialspoint.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/ijighjk/janalagepom.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/ISmiaA5/cat_and_mouse_io_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_601836f761f0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_6001a97d0dc38.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/netgear_wnr3500l_firmware.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gpYaOYn/35241093753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_5fd11c348ebf6.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/oxford_word_skills_advanced_free.pdfIn PDF document text
    • http://julugemuzejib.22web.org/descargar_mapamundi_para_colorear.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5ff6b39c540d6.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/ihHhfxt/63451421528.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/2Dspk1C/vex_iq_2020_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodowurivav.onlinewebshop.net/76163759002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8fe3d8-cddf-4638-99f2-8bf854aca628/garmin_2699_battery.pdfIn PDF document text
    • http://pulilidason.epizy.com/pieces_of_information_data.pdfIn PDF document text
    • http://vevaxadebelag.epizy.com/lilupesepitibape.pdfIn PDF document text
    • http://jumezasaguruwu.epizy.com/fax_transmittal_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb6a3d-8747-444d-89c0-17cd8f00e90b/94212017685.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://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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 5412 bytes
SHA-256: 1df1f2806271129a8a8de6e1d14dbce85bbcca415b239482fa8631ec912b97b6
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 12096 bytes
SHA-256: 9a490254466d1d6a650720e50b842c6d56f45070737459dad9d74962c12c7788

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