Malicious PDF — malware analysis report

Static analysis result for SHA-256 f037e88355677e94…

MALICIOUS

PDF

81.8 KB Created: 2021-09-17 20:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e7d15a9a4a74e5cbd32b4f9a9be0e9b0 SHA-1: 5e5c9100b884c4a645c4156c438e0ad06d5f454b SHA-256: f037e88355677e94ced53d80bc0660fbc44e769c3cc7d54491ec85888b02474e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs users to copy and paste content into a command-line interface, a common technique for executing malicious code. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://leganordavigliana.com/uploads/file/juliwobi.pdf In PDF document text
    • http://yujinpharma.com/upload/files/kosalelosinuzuxajegegefi.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210911064240.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210917192601.pdfIn PDF document text
    • https://baongochoa.com/upload/file/28761727150.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/xomubixasanukiwumidoja.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/zupejenojozexeguji.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/33742712489.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/17593116577.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/buzorejavezexoke.pdfIn PDF document text
    • https://vpmemorial.net/images/file/xodirago.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/31670374966.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/76516517046.pdfIn PDF document text
    • https://camphacement.vn/upload/files/87170853259.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/wulabudi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/eh2e6r0sa22pusvoij9o2qem7l/takutenasakum.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210905_012435.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/88564693848.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396aa994d02---74619297268.pdfIn PDF document text
    • https://csn-alliance.com/data/files/zerisube.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/79846064412.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210904_10B621BB873EA683.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/26695172534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=android+device+name+on+routerPDF 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_off0000db15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 10464 bytes
SHA-256: ac6a22b2aec880fee536e26508259e97f11cfa96809aa0b02dc80a482f430588
font_02_sfnt_off00010af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 17592 bytes
SHA-256: cbadf83e67f4109186034dbfd0f417af7c152de8e6da841941a268a89d351971