Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee61e6c2b8907c48…

MALICIOUS

PDF

74.2 KB Created: 2021-02-16 03:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d7131684fd168dca3833b42d11c7d1b8 SHA-1: a5da8113e0f5436097a8b2af4f0097d5c51f4e2f SHA-256: ee61e6c2b8907c48d55257d3613c25174fb755c0ef76b9927dac45b254c6824e
222 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic indicates a link to known malicious redirector infrastructure, and another flags the document as a potential phishing attempt. The presence of a 'download button' heuristic further supports the lure of downloading malicious content. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wb?keyword=hp%20laserjet%20p2015dn%20driver%20mac In PDF document text
    • http://clubstore.info/74239957954ghejm.pdfIn PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/da23b.pdfIn PDF document text
    • http://urologo.store/84178579336gdf0z.pdfIn PDF document text
    • http://quickpapp.online/sample_case_brief_format_law_schoolhel0l.pdfIn PDF document text
    • http://businessoutsourcing.info/cadena_trofica_esta_formada_pork9jrx.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/ef8823b8ed3.pdfIn PDF document text
    • http://makamar.xyz/numerologia_karmica_destino84x5g.pdfIn PDF document text
    • http://pedalini.club/charm_king_games_free_onlinelzsg9.pdfIn PDF document text
    • http://tameeniraq.com/general_anatomy_vishram_singhjd44h.pdfIn PDF document text
    • http://prequester.online/the_richest_man_who_ever_lived_freetym5m.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/salosibejodod/xekob.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/50094559273.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/dovotorumafudanupojijidu.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/bavikilenimumuxav.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/international_migration_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/wallpaper_for_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/chemistry_lab_report_example_high_school.pdfIn PDF document text
    • http://bubokamuwejutul.rf.gd/analisis_de_sistemas_informaticos_definicion.pdfIn PDF document text
    • http://waroxudon.epizy.com/jezitoxatodidif.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/high_voltage_converter_transformer.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_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 5768 bytes
SHA-256: 98ea3829ca33adb81f915ea43bd773a227ac4d73d2bd1a820a839a2535469fd5
font_01_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 13224 bytes
SHA-256: 4328d8910ff3b6eea3203e200f1be737410c788f0171249cd54c5331fdca1deb

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