Malicious PDF — malware analysis report

Static analysis result for SHA-256 02eba7de5bad36bd…

MALICIOUS

PDF

88.4 KB Created: 2021-09-13 15:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 71049f553b7bd5526ab2a140b8b8d970 SHA-1: 5a31c03b22facf571a8469bf1c8cfb30dd1908b3 SHA-256: 02eba7de5bad36bd56f8ee57fa01203469b21f7d355ddcff7d746ab0b80cd11e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to other PDF files on distinct domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or credential harvesting attempt, potentially leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://tw-tms.com/uploadpic/xw/files/pabaviwibenubolaribat.pdf In PDF document text
    • http://dichvutheapec.com/upload/FCK/file/zenekugoxivano.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/040239272049.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20935234582.pdfIn PDF document text
    • http://e-sportis.com/images/upload/774280913.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/xuximirorevirepem.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/zesaparupulogezuvow.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/4129643580.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/35077843032.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/9316219001.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/38540019414.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/kotozedupipalowose.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/50077707517.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/butetugotememes.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c8cea2b53699e2cf6a631b03e3085dfb/37124733560.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/sebonidusidi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae54b62a86---70089344529.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/vopuwoxodidulazepujijed.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/37518983610.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/kepajunajiruresokoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=gacha+club+ios+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD291 16324 bytes
SHA-256: e02f7a2c62afe0e867be0da5a6f2f525b9ab3943161d924a42da68a9fbd817a8
font_01_sfnt_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 22960 bytes
SHA-256: fb35f6b267ec51dcb7895e40ec025e212530a298892f4117dd307493d9211471
font_02_sfnt_off00012446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12446 10408 bytes
SHA-256: 097bcf20c1b8a92b6b31721035fd45cc7d8b3d05da2566f010cac80ddd09d15f
font_03_sfnt_off00013bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1