Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2afd4d11bb8239d…

MALICIOUS

PDF

130.7 KB Created: 2021-06-14 07:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97293dd0b2bf1023e71dd4ebb909d4e3 SHA-1: ea24d387861bd29a4e4f15c7e225991f2052ba92 SHA-256: f2afd4d11bb8239d4d9e7a23dd1a0763b33ed820e5bd207323e93e3083f331ea
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 URL pointing to 'https://irlanc.ru/pbw?utm_term=mtg+arena+obb', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains strings related to 'Mtg arena obb' and the authoring application 'wkhtmltopdf', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://irlanc.ru/pbw?utm_term=mtg+arena+obb
    • https://static.s123-cdn-static.com/uploads/4411483/normal_5ffe92eec60ef.pdf
    • https://static.s123-cdn-static-d.com/uploads/4403274/normal_60b169dbe2339.pdf
    • https://cdn-cms.f-static.net/uploads/4451752/normal_5fd13be456a7d.pdf
    • https://static.s123-cdn-static.com/uploads/4477167/normal_60072c2b3b824.pdf
    • https://cdn-cms.f-static.net/uploads/4500667/normal_6014121e73f50.pdf
    • https://cdn-cms.f-static.net/uploads/4413707/normal_6035730e6272c.pdf
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5ff3b2a8ace1b.pdf
    • https://static.s123-cdn-static.com/uploads/4380213/normal_5fc57592f04a5.pdf
    • https://cdn-cms.f-static.net/uploads/4468530/normal_603cbb59304bd.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_60207ace1e34f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e24f1f72-fb49-4cd2-9ec9-2ecebd463165/management_information_system_advantages_and_disadvantages.pdf
    • https://uploads.strikinglycdn.com/files/3db60cdf-4cb7-434b-af54-a6d222df35c4/how_to_string_a_stihl_fse_60_weed_eater.pdf
    • https://uploads.strikinglycdn.com/files/e16faeda-7767-43d1-948c-63f359283d2a/pretty_little_liars_book_3.pdf
    • https://uploads.strikinglycdn.com/files/12ba8ddc-ae5d-458a-ae79-a4d61be29e15/lopesisutubora.pdf
    • https://uploads.strikinglycdn.com/files/939fe335-1cd7-4f44-91f9-4bcd37802da5/possessive_pronouns_quiz.pdf
    • https://uploads.strikinglycdn.com/files/f9e31596-780f-4fcd-ae9f-523a03e87448/24941638596.pdf
    • http://pigedigasexu.pbworks.com/f/37762416259.pdf
    • https://uploads.strikinglycdn.com/files/94b3bd09-1249-4af0-b4bd-cb4327ef25a4/el_cantar_del_mio_cid_personajes.pdf
    • https://uploads.strikinglycdn.com/files/b37863dc-36be-4389-919d-a781df3d2547/81261813228.pdf
    • https://uploads.strikinglycdn.com/files/7bde6406-620f-4d8a-9569-5baa09c95d58/16563310549.pdf
    • https://uploads.strikinglycdn.com/files/753357de-7705-44bd-b0c7-b9b0bdbb2341/linda_goodman_love_signs_libra.pdf
    • http://jitijaloj.pbworks.com/f/ejercicios_resueltos_de_tecnologa_3_eso_editorial_teide.pdf
    • https://uploads.strikinglycdn.com/files/018cb77d-4e8e-4ebd-921b-04e771586c80/lazexilifebavap.pdf
    • https://uploads.strikinglycdn.com/files/c858b7c3-8a53-4e17-a35c-0f896e058104/kuvavulu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001802f.bin
6f5025ff4782e9a3458f0d6d75b93d7bc15f4bbfb06d53d05c996ae55439fc70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1802F 17800 bytes
font_01_sfnt_off0001b996.bin
168a766ca2a4b307aaa01ef6dc135eedb44994fe8965ea744be6217755d70466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B996 4788 bytes
font_02_sfnt_off0001c9fd.bin
9ad6abcdf599fac74a10fd2ffad4fbc03b9bfe67e1eea73d06d35fbb349f10a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9FD 18128 bytes

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