Malicious PDF — malware analysis report

Static analysis result for SHA-256 95db227437bf4c13…

MALICIOUS

PDF

74.1 KB Created: 2020-12-27 02:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 56eda8132450122a4b1f7145d3771a59 SHA-1: 83ee1c94ae47eb1ec47469b36bed8ffc6def42ed SHA-256: 95db227437bf4c1328e0d6e7e18821eb705da77bf1d5261e432594adb8b46686
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs pointing to known malicious redirectors, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?utm_term=bratz+rock+angelz+game++full In PDF document text
    • https://cdn.sqhk.co/wemofisejaf/ROwbDnC/diwesok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5fe269a014f78.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/hiYPicJ/real_car_driving_experience_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/JidO5h5/76079642942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f8d82df0ede2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f23afef4-5336-4e59-91b6-8ac580116b7d/94701070215.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/quantitative_aptitude_questions_for_gate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981d3709-ad68-4a78-89ec-16e7dde04b1d/boboxikepes.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/ammonium_acetate_msds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa202e2-cc5b-4f23-ac98-b0d5a0e26bda/the_yellow_wallpaper_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa412a4-0e76-411b-8bdd-4fc28851ed9f/stickers_for_water_bottles.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/computer_mouse_free_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kasawunotunuz.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/70284246409.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B1 5020 bytes
SHA-256: a18d26acb881ffa6f239aafc7db10f213fb25c4f1e2d989b1198c61ff2fae9b9
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 10396 bytes
SHA-256: 5f86237fb0bd0fbd4f15577021e70523e203cb1a55b287e6b8809a631e7a6eac
font_02_sfnt_off00010d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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