Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1e4f386a003d1d…

MALICIOUS

PDF

99.6 KB Created: 2021-05-10 14:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fe32412e70d2ef7a654cbef62d86d171 SHA-1: 578fedf743c4ea47a1f4245bdf6477df8d9b60dc SHA-256: 3a1e4f386a003d1d4ee8d947426a88c4679cdc33c12024c5bcfa57b8515006f3
164 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. It uses an urgency-based lure. 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 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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    URL https://bologen.ru/strik?utm_term=citing+unpublished+federal+cases+in+california+state+court PDF link annotation
    • https://cdn.sqhk.co/duromivap/hhgdBES/junafukupedixizekuwavidij.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/16fafdd64183.pdfIn PDF document text
    • https://jokanile.weebly.com/uploads/1/3/5/9/135962808/pewuremix.pdfIn PDF document text
    • https://cdn.sqhk.co/senepaderu/gJifhgU/zumevojaloziz.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/davuxebilokir.pdfIn PDF document text
    • http://nosetibadap.iblogger.org/zenebiwig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobujosu.epizy.com/ruvonapabutuduvuxajame.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/52397891707.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/cayman_islands_government_scholarship_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/isometric_and_orthographic_drawing_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/tedegudito.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/gemesapudivemanogituva.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/wukosuwiresax.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/dinoxunap.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_3e41128ac2744683883a87cd4fd3db57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wavunot/idioms_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/el_mundo_magico_de_terabitia_pelicula_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/pabupekidopidogodol.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_fc59ce3c42d149fab4ce59bd89922f40.pdf?index=trueIn 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_off00014728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14728 5464 bytes
SHA-256: 768e5dad5c2614065cfe78276ce0a291ce9ed087fad486f21ba7080851b13db4
font_01_sfnt_off000159ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AB 11548 bytes
SHA-256: 3d1a99dd23073f463f70101918d44ee8a94eba42b2fee3534e588048fe9ab755

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