Malicious PDF — malware analysis report

Static analysis result for SHA-256 e266d066599b4ab4…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 04:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ec0988a6d903991cd5471c9d1b0e1274 SHA-1: 8dd6af82ce6530aaf3c3153a3c6081584fd1775b SHA-256: e266d066599b4ab4b6c09962740b23cad11b3ad9aff05f52bc71106c259bc4c6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to suspicious or unknown domains, and one heuristic specifically identified it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of multiple external links and the overall detection profile suggest the document is designed to lead the user to a malicious resource, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://pracowniatechart.pl/fckpliki/file/9488895312.pdf In PDF document text
    • http://deeringbayrealestate.com/userfiles/files/kotipatamevarugo.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/pegakazexuvorepupafas.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/wuniwo.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/kanonelamulivugamafasiloj.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/kadukapexepunararose.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/32493336295.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/85971396677.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/wetawetinide.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/94061320331.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/94302385641.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/subepuxorosamizir.pdfIn PDF document text
    • http://orenprom.com/img/account/file/53869982648.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/xekufakawavewa.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/zefeduve.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/26486535696.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/38244244324.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/52388628869.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161321b4f3f10f---gagufejogofabu.pdfIn PDF document text
    • http://cold.lt/userfiles/file/rojagunegutomiga.pdfIn PDF document text
    • https://gitimohammadilakhimpur.org/ckfinder/userfiles/files/72409865352.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/83501768805.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210908091046.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/69199935900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=shadow+fight+3+offline+download+for+androidPDF 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_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 10796 bytes
SHA-256: a7fdeb53f7696af82cd95aa0633779095fbb259ccccf6880e9d26cc393b6cd9e
font_02_sfnt_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 17964 bytes
SHA-256: 87da6eed8b6163263d447b78e171981079233f90c44e47986b134acf7eb99b1c

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