Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b992e184e9593e8…

MALICIOUS

PDF

74.6 KB Created: 2021-03-21 02:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: beeac4ccfc99f8bad99c4e77c434b502 SHA-1: 83fec04a4ccc2d00bde76d5208f2590791243c2b SHA-256: 3b992e184e9593e89dc73c16adf5aff2e6e8c1b3486ba0e9bd8d7202a7071798
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://seumenha.ru/strik?utm_term=3+grade+math+worksheets+addition PDF link annotation
    • http://ketotreno.buzz/55643655631phpyf.pdfIn PDF document text
    • http://sy0n.icu/snow_white_with_the_red_hair_episode_23wge2o.pdfIn PDF document text
    • http://kyponnik.online/jealous_by_labrinth_piano_sheet_musiczmeju.pdfIn PDF document text
    • http://iqecoportal.ru/118270558873yd8r.pdfIn PDF document text
    • http://help-violation.com/childrens_rugs_walmartgxsyt.pdfIn PDF document text
    • http://osmosiotzs.fun/71799922329rqqu1.pdfIn PDF document text
    • http://maslovauto.ru/fekafekedujovisr2z9j.pdfIn PDF document text
    • http://sfhgfje5df.xyz/84328240810zdhkv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac27e6f4-6165-4330-821d-976603f1586a/jabinu.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/idling_to_rule_the_gods_challenges_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/niwurufor.pdfIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_6182d93e5f0e4ccc9999c3d49a9f720b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/dewalt_4200_psi_pressure_washer_for_sale.pdfIn PDF document text
    • https://4f870d4f-701c-4ec6-bbb3-7277acc5528a.filesusr.com/ugd/fdcb8d_640be209baa04309a7007c6c5d00dcd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/curtin_university_library_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3593bb73-fb6f-4812-966c-28405c2ef347/nonudojipigusapidij.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/wifalenetivixupevanun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db086bda-fa5d-436f-a30c-9ac0fd59008a/what_sauce_goes_on_dominos_philly_pizza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c53a6a9-dc18-491d-8b01-81684d3ac01d/gasibatene.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/vidalizoro.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/62640940174.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/75686408104.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_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5432 bytes
SHA-256: 47b52d41fb8b15b03bd14dd3e8b59ac453c15abd5ea96294376e35c0f915b769
font_01_sfnt_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 9804 bytes
SHA-256: 9630aabef537880a90ee7b1b10df00e4adfbe1522da5895605f74c02abb41467

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