Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb99dc5e6dc9af4…

MALICIOUS

PDF

77.0 KB Created: 2021-02-22 23:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 83fb51a5a6830b134423103a3bd439bb SHA-1: b9cc89c87fdd00976fdbb6c3bc236deaf0dbb759 SHA-256: dfb99dc5e6dc9af406b5d2b2b797d95e2938988064daa719ffab920ac199c5b2
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 0.9991

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://seumenha.ru/123?utm_term=how+echo+show+8+works PDF link annotation
    • https://kaxapanokatonab.weebly.com/uploads/1/3/1/0/131070327/1513915.pdfIn PDF document text
    • http://jobware.pro/chevening_reference_letter_template2ex68.pdfIn PDF document text
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/fikaparenigila_vufugabirezivi.pdfIn PDF document text
    • https://zokemubolito.weebly.com/uploads/1/3/4/8/134895641/7727718.pdfIn PDF document text
    • http://spainsale.pro/88454694068okzjv.pdfIn PDF document text
    • http://raifaisentgo.online/samsung_tab_s6_user_manualf35vb.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/4770642.pdfIn PDF document text
    • https://riligasiguvenu.weebly.com/uploads/1/3/5/3/135392009/sixupegerip.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/539527.pdfIn PDF document text
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/tumerulo_judijakasizap_bajozejolad.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/lobenumavurew.pdfIn PDF document text
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/lutalotite.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/jolozidabi/august_month_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/functional_iron_deficiency_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/sistema_bethesda_para_informar_citologia_cervical_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/intermezzo_cavalleria_rusticana_pianoforte.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/brawl_stars_free_pc_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/sheet_pan_curried_chicken_and_cauliflower.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/20724632818.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/florida_ballot_2018_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/ribibew.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/norodolovifezajupuga.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/nijofa.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/chipotle_fax_order_form_2018.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_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 4956 bytes
SHA-256: d94283fd8437b63b9c44e504e33857b4e17cda9b9c6ab185f43eb751e0cc56d2
font_01_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 10460 bytes
SHA-256: c6b1860284c1b60654647868c9239c86fe249b4e01b02af6347450af998a6c5c

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