Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f71d93eac00ac5a…

MALICIOUS

PDF

75.8 KB Created: 2021-01-03 07:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ce792e8594aa0e054a1332527b3a39d8 SHA-1: 61a168423a030cf08122e1f42db94536164f9abe SHA-256: 8f71d93eac00ac5a539c60bd0664ec76427f132987606d07be875cb7a5bca89e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, disguised as a recipe search result. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffi.ru/123?utm_term=gluten+free+swedish+meatballs+crockpot PDF link annotation
    • https://cdn.sqhk.co/luwivimexu/hffkEWz/buwivarisizamiwotudawonen.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/yicLoib/mesamomal.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/JIheZid/pubigitezamok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_5fd9a64e23c55.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/fjcJjdd/btd_battles_mod_apk_unlimited_in_game_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_5faa614c7d530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5fb6e61313732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebisop/td_ameritrade_roth_conversion_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/26741008469.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/5678625200.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/54071990878.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/solid_waste_management_ppt_presentation_free.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
    • 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_off0000d67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 5720 bytes
SHA-256: dd0ba122a85ffaa4e6d35cfe506346d4d026adea5f672be84d1ec00da8e46156
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 10812 bytes
SHA-256: ca3ce5d7bb01b89c60f32234a8f2b19094b133a56cdcb0632ee41530574c4794
font_02_sfnt_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8

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