Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd0e7ae555038b6…

MALICIOUS

PDF

78.7 KB Created: 2021-09-22 13:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6d4193d52576585722975cc5d2ef239 SHA-1: fa0e145353f3b9b667d122750cd17c1c2b7a0a4f SHA-256: 8dd0e7ae555038b60fd902a4b9a6246592bf458e5bc0b5fd1024169d3030f9ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the PDF is designed to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/maucqjj4jvfgi7ciou2rb1gtu6/roteneke.pdf In PDF document text
    • http://pure-chiral.com/upload/files/4443808541.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210908/210908203550852663smv0n9w9nx3e.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16148e51e1ae3f---60866255475.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/nugonozabufiwulamopazuxi.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/13504961880.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/kafudodopemoko.pdfIn PDF document text
    • http://hhsmelt.com/upload/files/junuxi.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/telamopiwidukirik.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-4/20210904045053364429.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/rajazali.pdfIn PDF document text
    • http://riph.pl/userfiles/file/81165681365.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/16072247694.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/wodomaxiki.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/reretupuvemutisisoganuf.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/74078704756.pdfIn PDF document text
    • https://maisonforville.be/documents/file/70187710891.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/39222090066.pdfIn PDF document text
    • http://eternoohydro.com/d/files/67417681814.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/55592856711.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/96183008966.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/22856693705.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/61750800279.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/buwolax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=caller+theme+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 17828 bytes
SHA-256: acb08d913ea5ac627e267bedc1b37da8c849b8303e7214b761decee79c3c0e2c
font_01_sfnt_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 10156 bytes
SHA-256: 0de5cf2772af72c22c8a752eff486d78cfadbc5a34855f89dd2b11a41eadfaee
font_02_sfnt_off000115a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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