Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb151690f4f9a327…

MALICIOUS

PDF

90.8 KB Created: 2021-03-19 13:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2079631155b640a7bd769164701f6a5d SHA-1: af0e364e2a05f430b9e919dbd52027b8bfa1fb0b SHA-256: eb151690f4f9a3272d459aa8fcf112ecb5d6449fc780a4cf8c5de1f181c71530
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a 'download' lure heuristic further supports the phishing or malware download intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/award?keyword=cpr+guidelines+2020+pdf+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2 PDF link annotation
    • http://wufamega.scienceontheweb.net/rerege.pdfIn PDF document text
    • http://gratoraama.website/ac_joint_exercises5au0v.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/69106828454.pdfIn PDF document text
    • http://demask.space/98468876317ck1u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494440/normal_60202b0d2241f.pdfIn PDF document text
    • http://merovew.xyz/simew6e7z0.pdfIn PDF document text
    • http://tinudetigu.iblogger.org/maxumo.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/7yidjdm/gps_tracker_wear_os.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/51678183325.pdfIn PDF document text
    • http://limecash.xyz/splash_potion_of_weakness_guided9x51.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/74586289969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_602ca5de52f72.pdfIn PDF document text
    • http://fragcups.com/do_graco_bases_expirev00q2.pdfIn PDF document text
    • http://vabakavolageni.22web.org/nanog.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/8giAhiN/notion_notes_tasks_wikis.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/ihN3Qie/ropujevuroluzimuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5fd68aad6bd62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492546/normal_5ff2b315783c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_601f3b1cca34e.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/503c424f-d7c8-4f39-b553-cc966f92f73c/flir_tg267_thermal_camera_price.pdfIn PDF document text
    • http://wanuzenupikow.rf.gd/heart_broken_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9177e27e-3c55-43b9-a8c9-57785eb3ea2a/33792126762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c28be8-304a-4ffe-9780-88ab2cbf3eaf/10610885627.pdfIn PDF document text
    • http://besevinoferoza.epizy.com/52142995036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5ebd9a-3b7b-4b4c-aa41-d41bd4c018dd/kemufeketuzuxezevunusav.pdfIn PDF document text
    • http://jidoreno.epizy.com/26522269511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99512a8e-4b07-462e-b1ae-a2fa47d1af5e/85450026497.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001083d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1083D 16544 bytes
SHA-256: 68b29748374d0b7b55ddac989a75e3d1b2c953291dd293a64ace6868e69f44d3
font_00_sfnt_off0000e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE665 5180 bytes
SHA-256: 9971514c3e8f4334570e8e1cc959906e14d6fa88a9fedd9e91b1dbbb8bf52fa3
font_01_sfnt_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 6228 bytes
SHA-256: 0fbd635347094b7f8520fdac7ee126662e83bc2306d96d60919cbc5f499d3c54
font_03_sfnt_off00013629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13629 10320 bytes
SHA-256: b36ac808407ef462b4224fd7225a9a5aea6a3b3ed8c56a0027f7968723d72539

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