Malicious PDF — malware analysis report

Static analysis result for SHA-256 33bc8597f959ad7c…

MALICIOUS

PDF

99.6 KB Created: 2021-03-23 06:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 968748a081431f7511062dd04681827d SHA-1: 59d48ebfa3dec89821d5d3a055a539bd09a2d591 SHA-256: 33bc8597f959ad7c310dc4416163753fa1ca8dc45b55f38b2edfb9ac42ca7f5b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/strik?utm_term=what+role+does+the+committee+chairman+play+in+congress PDF link annotation
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/gofiladite.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/2135559.pdfIn PDF document text
    • https://vulakesekek.weebly.com/uploads/1/3/1/4/131438428/megakorodo-rigisuzasaxovo-dekigo.pdfIn PDF document text
    • http://kakerusejom.iblogger.org/46917720011.pdfIn 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/29b3a684-2782-455f-807f-9a50ee1a9cf0/denon_dp_300f_stock_cartridge.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/xirosuwezobunovugulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b9d50a-3e8c-4c43-9613-449d3a806b7c/8701864313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef16193-2976-45fa-a174-1be63497e168/the_count_of_monte_cristo_movie_download_with_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/yaesu_ft-450_manual_espaol.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_3d2cfbc0e2bd45dfa8fcd5391ea5f7aa.pdf?index=trueIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_db2e6f6f4f03430ca58d10851cdf5240.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bodajaku/fulubeke.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_9120032e3685497fa92c682209f51bfc.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_3f7c0dfbbeed4011b4022c3b97c3ebea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/how_does_global_warming_affect_polar_bears_and_their_habitat.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_8c6e066f9adc45b88f6b2986f005fa3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53b4f91-11a4-406b-8789-d9d522302bd7/bivilededebix.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/worksheet_4_the_composition_of_blood.pdfIn PDF document text
    • http://mitegoma.rf.gd/zuzumusosekijadanuladevu.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/android_device_emulator_for_windows.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000149b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B2 5600 bytes
SHA-256: ded996c43e0b5753d30113fc211969771bd65226b1344866dd81a9c85118308a
font_01_sfnt_off00015ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA6 10452 bytes
SHA-256: 9b76bfa19e6a2b71f5ebdc7254b0fd7fbc002c8adf12d0795069ee115db3cb1d

Open this report in the interactive analyzer, or submit your own file for analysis.