Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e8d251e0485a28…

MALICIOUS

PDF

91.9 KB Created: 2021-03-08 02:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7337ba3c63475ed8f64f3d19964b7134 SHA-1: d12cd2182f3959a70b25aa38ede55ab2acbeee68 SHA-256: 29e8d251e0485a28081dd12366a0fb884900fdeb4b416638ea14781a457745d0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to malicious websites. The primary malicious URL identified is https://resalured.ru/wix?keyword=pert+secrets+study+guide, which is likely used to serve further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=pert+secrets+study+guide
    • https://static.s123-cdn-static.com/uploads/4369781/normal_5ffa341b679f7.pdf
    • http://sesizuxewewax.mygamesonline.org/cisco_linksys_e4200_default_password.pdf
    • https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/6004603.pdf
    • https://gibolavisijubaz.weebly.com/uploads/1/3/0/8/130813033/xutegilalojok-viwujusez.pdf
    • https://cdn-cms.f-static.net/uploads/4493201/normal_602aae50056f5.pdf
    • http://nijalatol.mypressonline.com/lokegireritesebigibuke.pdf
    • https://keminozabigorez.weebly.com/uploads/1/3/4/8/134886120/4759624.pdf
    • https://cdn-cms.f-static.net/uploads/4489440/normal_5fe7a40db55b4.pdf
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/zerewolitoba.pdf
    • https://cdn-cms.f-static.net/uploads/4423442/normal_60159b693055f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kemuvatixas.epizy.com/financial_reporting_meaning_in_accounting.pdf
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_da37198d7b514bf5887cbf23c5d05395.pdf?index=true
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_8bdb94ddb2724636aed2bab380dc2678.pdf?index=true
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_73415d4154144c68b1da489fc28e2f4d.pdf?index=true
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_57f24f50449949339e948dbe89708cd2.pdf?index=true
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_e86f1d1bcb9747ef98e8d3c8a07de4c5.pdf?index=true
    • http://kexeban.rf.gd/texas_instruments_ti-86_manual.pdf
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_40353abc5b3745469e0d45864592aad6.pdf?index=true
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_3be39b212c3e4b9b940d507710cc8628.pdf?index=true
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_7c363737e5014e4c93db3eff9b05e10d.pdf?index=true
    • http://kudogal.rf.gd/what_is_the_hermetic_philosophy.pdf
    • http://soxuxemakim.rf.gd/casting_defects_ppt.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c68.bin
707ad819a72971e99d35a9be4b09585fd95745a12082d073626e366a8839438a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C68 4968 bytes
font_01_sfnt_off00013d6b.bin
eabea2faf0f88499f8a2323eb88a850920b1688718230ba221cbc18bfca0c814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6B 10648 bytes

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