Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07df049a8acf709…

MALICIOUS

PDF

70.1 KB Created: 2021-09-30 11:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 78c69d99c27e0418eb80bc00146330ff SHA-1: c5ba93f72403809dbc19cafbe3f32299906b1ba2 SHA-256: d07df049a8acf7090bbbdfd47c78bb138c418f407bcd4c76d2f023d68b9526bc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the presence of embedded URLs and the heuristic 'SE_LOLBIN_RUN_COMMAND' suggest potential execution of commands or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • 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://szolnokepul.hu/userfiles/file/94969859760.pdf In PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd0d49e8a4---40108726795.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/zifabuvuwurad.pdfIn PDF document text
    • http://zxsolar.com/d/files/kuxutexobepuv.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/64616579832.pdfIn PDF document text
    • https://aromamarketing.md/img/files/74663288206.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/bokiboromajig.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/volir.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/visunur.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/78381239101.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109260744567863.pdfIn PDF document text
    • http://4bx.pl/public/file/6460557740.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/87198663262.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/20128010398.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/148f1rlcio4icmdvcguhiblhnf/wipem.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161517ae6a35b3---taruvamaz.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/24956737193.pdfIn macro / runtime command snippet
    • https://hfbee.tw/upload/ckfinder_temp/files/20210907065540.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/pilezixuweneboda.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090615271131.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/59179786726.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a0b986598---wiperodizozujuna.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/serabirus.pdfIn PDF document text
    • http://yjccnc.com/upload/files/46234557152.pdfIn PDF document text
    • https://psychotherapie-dr-albrechtIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+incredibles+2+123moviesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC792 10888 bytes
SHA-256: f8eb22ee365817a56791d1918872297c10ac1a5340ed913c6a7e427d38e774fe
font_02_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 16240 bytes
SHA-256: e142644d4a5b5bbd6e28c8328ddd9de81fcb17c80d085cf241b6dc139e2cd5e8

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