Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaddb756a11b00ce…

MALICIOUS

PDF

99.9 KB Created: 2021-09-18 07:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b4870ef446c26b573a3a01e94f1059e3 SHA-1: c24cc2cb179202e3869b8dff7412098927c65d6d SHA-256: aaddb756a11b00cedb301da755578592891f78f528ab315caa79dcc1bd3a6297
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish for credentials. The embedded URLs and the heuristic firings indicate a pattern of SEO poisoning or link-based social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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
  • 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://mictrogiang.com/userfiles/files/fusazawiwodadukewidib.pdf In PDF document text
    • http://illinoislivestock.org/userfiles/file/77361641476.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lj94bg7i4mpk4iu592o8nt9btb/69065749276.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/90722669591.pdfIn PDF document text
    • https://miet.hu/kepek/73909634779.pdfIn PDF document text
    • http://chinalabware.ru/d/files/zifokewimoxam.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/13504923413.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/91456924189.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/vodafewutuzanebaremewo.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/pozipunetunopivem.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/pijojabemozol.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/wuwimoziwefawavewaxabuv.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/gobiv.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133253451fa2---lodajuweve.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/zumixomodominuxu.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/19498776865.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/nipazuwigos.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141157c75fce---5686217632.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/367298686.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/pasasavozafarusape.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/6071361997.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/tixepufufaxabafofozuriza.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/fiwejurozupoxovasaluvakug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=h%C3%ACnh+n%E1%BB%81n+cho+android+%C4%91%E1%BA%B9pPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA79 16652 bytes
SHA-256: 06f4c21d5d0f7259f44f20038b57ca6b7299341ee0bb0de42a8918bb032fe797
font_01_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_02_sfnt_off00010ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 27556 bytes
SHA-256: 0a4f02e11c9b4eca4500f2522ac57c080c54d9d5768e358f18e7de7fb343d904
font_03_sfnt_off00014f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001676d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1676D 10744 bytes
SHA-256: 2b5993e8f27fe4b5e22b700f1941539858d7ebf7f33ac971d43273437a28d4cd

Open this report in the interactive analyzer, or submit your own file for analysis.