Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6b5603ab8442a8…

MALICIOUS

PDF

81.5 KB Created: 2021-04-08 09:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45e6413ea32363b17bcbe1f28b3d0da8 SHA-1: c49b0db9367a119a513527e3c7e86334111645e5 SHA-256: eb6b5603ab8442a8dc1f5b03d40ed84030c683154d0c8d361a8882f9ce519bb2
156 Risk Score

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/123?utm_term=consumer+reports+canada+tv+ratings PDF link annotation
    • http://gerisekazaleg.22web.org/40407024312.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/nosere-xopuji-fepogagaz.pdfIn PDF document text
    • https://notebatamigoxaw.weebly.com/uploads/1/3/4/7/134715817/7fe6a5c56459.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/630b3a6a13.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/basukolegudasumusaluj.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/xutugu_soxefuwoxi.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/solid_waste_management_full_notes.pdfIn PDF document text
    • http://lulaterunudagob.iblogger.org/72090775647.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/how_to_release_psoas_with_foam_roller.pdfIn PDF document text
    • https://kenomixu.weebly.com/uploads/1/3/0/9/130969587/doleguge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patotale/workday_hcm_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/afarinesh._org_reading_test_6_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/one_direction_rapping_fresh_prince_of_bel_air_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/windows_7_bootable_usb_free.pdfIn PDF document text
    • https://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_e7dabdb55a324408ab3ee1eb367345e7.pdf?index=trueIn PDF document text
    • https://90b6428a-f85d-4fb4-90f7-6cca40d0dc23.filesusr.com/ugd/55544c_b907d93a936d4434b2abc63ad1759e84.pdf?index=trueIn PDF document text
    • http://sudezubedafa.epizy.com/rf_power_amplifiers_for_mobile_communications.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/gajijinovezojudosileki.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/jogezijokupeg.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/medical_report_sample_for_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/door_hinge_template_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/how_to_find_cash_flow.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_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 5328 bytes
SHA-256: 8c9ec93bf2b6bcbf3d1064e9bf878c8d3e554872215c92a43070e806e93f5daa
font_01_sfnt_off0001137b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 11024 bytes
SHA-256: 12b01f96bcd8df3c3c3c305f2fd1d7eb71aafd812cdd77625c3cd535d318a3e5

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