Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ac53290aca4dad…

MALICIOUS

PDF

294.2 KB Created: 2021-04-05 16:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25573ed1ddff5a9d56f14f71f18e405d SHA-1: b199f43d898ffa47cb7699d17663f423b3886382 SHA-256: 27ac53290aca4dad99de2c5ab7b564dac2b0d5c576a91554d03dfe80f54097e9
96 Risk Score

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, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by directing them to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9236

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://nipisod.ru/strik?utm_term=advaita+vedanta+philosophy+of+the+hindu+scholar+shankara
    • http://hh666o.site/43956165988uekb1.pdf
    • http://fezelaradelemuj.22web.org/follow_up_interview_letter_template.pdf
    • https://bedexupef.weebly.com/uploads/1/3/0/7/130775630/922476.pdf
    • http://livethailand.fun/war_planet_apes_tamil_dubbed_movieh3tfd.pdf
    • http://jesurave.22web.org/24098083119.pdf
    • http://vashe-zdorovie.xyz/18941117333p6sci.pdf
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/vawane.pdf
    • http://xidatumopof.22web.org/93487002789.pdf
    • https://tosulabemolajeg.weebly.com/uploads/1/3/1/8/131871730/92746.pdf
    • https://fusasevamasaxig.weebly.com/uploads/1/3/4/8/134866100/e013875.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sogigadataga.epizy.com/31639657513.pdf
    • https://s3.amazonaws.com/jezobasit/lazisoteviraxasupifebuv.pdf
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_a14581a16c10472b8ac6e443dd305dff.pdf?index=true
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_06c411a63b5642c59efbbc06781bac6d.pdf?index=true
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_4babed7f2220474882a764effa471c96.pdf?index=true
    • https://s3.amazonaws.com/tuxexi/kifobavu.pdf
    • https://s3.amazonaws.com/dorulusof/android_file_from_ftp_server_example.pdf
    • http://poxizigifami.epizy.com/72856602094.pdf
    • https://s3.amazonaws.com/sosupejuxofedo/jejasotipuxulexo.pdf
    • http://nofazixufewow.rf.gd/tabazodaluke.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off000453fe.bin
a8a76429a962c9189e0136525349444f0b1386157b967ce4c380bb8d892852ed		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x453FE 16608 bytes
font_00_sfnt_off0003f936.bin
ca58fabfaa4e965f33f784acaeda88efb6ca87dd0c4b55af76109ceb2edd24ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F936 5340 bytes
font_01_sfnt_off00040b5f.bin
2a3fa1c231c77e92136e162396721c270582e889810fcf2cd902e670a42cc2d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40B5F 3772 bytes
font_02_sfnt_off00041705.bin
4e926c2f640b8782d15460f0f9213637fe56f936e8b8b509ce103fed6ecd382d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41705 16560 bytes
font_03_sfnt_off000445fe.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x445FE 4324 bytes

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