Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a7b7dfa0fa8612…

MALICIOUS

PDF

164.0 KB Created: 2021-04-05 13:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5cb818a014f380db11136b92bcaa8ca SHA-1: a0c1ec9138dda12429b7d04978acc2f7884e9fd1 SHA-256: 19a7b7dfa0fa86124ecd416004bd86446d5b165788b02c7c3e6011da69fa2feb
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'druttle.ru', which is likely the primary lure. The document body, though heavily obfuscated, appears to be a deceptive search result or download link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=beatles+white+album+super+deluxe+pdf
    • https://cdn-cms.f-static.net/uploads/4422163/normal_6029a85c28263.pdf
    • https://cdn-cms.f-static.net/uploads/4413467/normal_602c76e9d2697.pdf
    • http://biwalataluru.22web.org/50334317440.pdf
    • https://cdn-cms.f-static.net/uploads/4420451/normal_60653a52d8acf.pdf
    • https://static.s123-cdn-static.com/uploads/4373776/normal_5feb79d153ced.pdf
    • http://idealica-official.website/cricut_joy_user_manual07e7v.pdf
    • http://retys.space/650507260739yoni.pdf
    • https://cdn-cms.f-static.net/uploads/4451356/normal_6050d45124c76.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/490820e6-19db-4459-9c34-f0fd5dfad8ee/44701048541.pdf
    • https://uploads.strikinglycdn.com/files/19af8bac-3c90-4638-ab79-8e5d82095043/10_month_old_milestones_chart.pdf
    • http://fexewagesulel.epizy.com/stihl_ms_250_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/ca56a6c7-ecf4-456d-9bcf-6ee90433f85a/98360808133.pdf
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_52a69e49cab44db7bcb1d0aa28e0c275.pdf?index=true
    • http://nakepusigazu.epizy.com/que_significa_movimiento_rectilneo_uniformemente_variado.pdf
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_c75101fd0aa34e1b8cb3951ac05c4d1a.pdf?index=true
    • http://kepatuzazavew.epizy.com/how_to_play_mini_dv_tapes_without_camcorder.pdf
    • https://uploads.strikinglycdn.com/files/027eac57-9712-477a-bafb-dc912b33020e/wusujiwuduxununagusized.pdf
    • https://uploads.strikinglycdn.com/files/dbe24220-72db-4098-8e3f-b39a00a3acda/jelunazuveruno.pdf
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_dde86aa8d1fe45d3ada53ab6fa325389.pdf?index=true
    • http://jibefemojus.epizy.com/78216555536.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021a6d.bin
48b3dcc580a94bf9e4922ee718296577a6badf9c7bc60f6abeea71eee1053953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21A6D 7804 bytes
font_01_sfnt_off000234b1.bin
03b8c0cb21584c27c8bf8298afb8b2ffe650c03af188555839c2968a7093521c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x234B1 5296 bytes
font_02_sfnt_off000246b7.bin
c696155e20f98569d9d066b249f55d94f0a02d9689f61767e5ec4553b5759c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x246B7 14488 bytes
font_03_sfnt_off0002749a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2749A 4324 bytes

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