Malicious PDF — malware analysis report

Static analysis result for SHA-256 df46a448257df22e…

MALICIOUS

PDF

76.1 KB Created: 2021-03-08 20:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50e50879c8685e09c9f4cc8ff34e0281 SHA-1: 9ad306b82c266e59bb0ecada1c5f1b22563270d0 SHA-256: df46a448257df22ec55d9e1ee5bb674826b2dd4ea3ca110a9591c53eb82f6834
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 0.9998

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://baarspo.ru/aws?utm_term=how+to+open+3m+steri+strips PDF link annotation
    • http://ing-jobs-opportunities.com/employment_offer_letter_template_free6scqj.pdfIn PDF document text
    • http://istlan.space/mugen_all_characters_downloadx4aa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_5c0a86a0ce1e44a2a690410efab1ef6b.pdf?index=trueIn PDF document text
    • http://bibibojusajol.rf.gd/tqm_gestion_de_calidad_total.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/71147135150.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/abaqus_software_with_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/wumoxebobuzezipuvuxajebe.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/wovegawixisusi.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_5f0f0fa642c045898a30fa6ce98e5072.pdf?index=trueIn PDF document text
    • http://bapibalapu.rf.gd/how_to_use_ps3_controllers.pdfIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_95ff8337c84e478f8767f43bf127f1b2.pdf?index=trueIn PDF document text
    • http://todafamigetoj.rf.gd/57108765721.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_a85e2da3d1da4596a3560a7566a3165c.pdf?index=trueIn PDF document text
    • http://zawagebojirowe.rf.gd/xubudovadizobawuz.pdfIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_34179c4776d04920ad213b8183694bd7.pdf?index=trueIn PDF document text
    • http://fukijudetoj.epizy.com/ceremony_booking_form.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_80b096f9a7ac49f8bbfc72c1f31aaabd.pdf?index=trueIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_f019f5ece6124698a58706bc21fb9dae.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_db65b337f01b4029917e79523f341aa4.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_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 4940 bytes
SHA-256: 1eda15c9eaf153fc0c99c7312cfd9646d0964158dd40e97584b9d35d85217651
font_01_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 10520 bytes
SHA-256: b756f0a3594d555a317094ca7071743911005633c91193fa307ccd46dafc4fed

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