Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd85ef21ce62efdd…

MALICIOUS

PDF

83.2 KB Created: 2021-04-23 14:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: abdc6c91438a260a5045ea19dd1e60c4 SHA-1: 5498c948d1a8ceb7ead93404e6a13b5bda206e30 SHA-256: dd85ef21ce62efdd953f5ea4e244bee13969dd1fa4392c966f1ba46a7074e0c6
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 0.9998

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://druttle.ru/strik?utm_term=morning+pages+julia+cameron PDF link annotation
    • http://bonus332.site/how_much_does_the_average_slot_machine_makezf659.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/jofonuziwimdsqj.pdfIn PDF document text
    • http://esplus.pro/why_is_my_nintendo_switch_controller_blinking_redov0f8.pdfIn PDF document text
    • http://mobile-media.moscow/fukeninx27wz.pdfIn PDF document text
    • http://bupro.asia/54929103631k3ee3.pdfIn PDF document text
    • http://easy-money-cash.space/division_worksheets_year_6g14nb.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/5b88b9e3-3553-4649-bfdf-7a58ced7fd00/why_does_my_brother_wifi_printer_keep_going_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/76290080401.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/best_happy_birthday_song_for_daughter.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_c5884430e68347b0b891e5f46924a617.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/73535191304.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/wafawugusovo.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/istanbul_travel_guide_expedia.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/durham_accident_reporting_center.pdfIn PDF document text
    • https://814bd5e1-0b6f-40f8-b2e9-6ab0015c5eef.filesusr.com/ugd/cc77ff_364948b6d12644508f8702a74f762f10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d2c6f6-a68e-4312-b80a-f1021f59d8b4/33581669967.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_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 5332 bytes
SHA-256: c24abb698ccf7932cc7b664e046ab844cc2df4d11c926fed119c9f5e158fa04e
font_01_sfnt_off0001194b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194B 11252 bytes
SHA-256: de8194a224cf1ef6b3d26c359e34703af32d21c9aff4a4df27c883a13d8468ac

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