Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6570510f28fd37…

MALICIOUS

PDF

79.5 KB Created: 2021-05-23 02:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f34ca432112684d9f74211477e2f34b SHA-1: c921dcd01f42decb861efb3a341f24f43b84ee59 SHA-256: 8d6570510f28fd37eec92d6f236b6be46e33cfabf03f09cb8981e0a627eda9de
196 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. It uses a password-protected-archive 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/strik?utm_term=compartir+una+carpeta+en+red+windows+7+y+windows+10 PDF link annotation
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/natevamabemugat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_606b5b53de785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5ff51e85a0659.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407781/normal_5fe5e1d0d5eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_600f10a883d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_601b338c2e37e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_6040a7c151f80.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/vixoluromakipasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_6058d6e53ff6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_6004d8eac92d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_6002f28775fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_60295ece2fcb9.pdfIn PDF document text
    • https://lebilelumebik.weebly.com/uploads/1/3/1/6/131636833/mugutabodi.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/firigugixujotov/stock_exchange_closed_good_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18992c55-5c25-427e-9ce8-217bb19c282c/ar-15_manuals_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/best_online_games_for_ios_and_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/zetebifiwamafafesoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cf2f0e-d0d1-4a56-86f4-8fa8e622f952/who_makes_panel_ready_refrigerators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5c419b-4679-48e1-a108-cfc045ee316b/does_morality_depend_on_religion_rachels.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/31794701955.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_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 5560 bytes
SHA-256: c72c349278ceaa285249259160a46da44792f0a63c21bda6b99bc4524b073551
font_01_sfnt_off00010ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA9 11080 bytes
SHA-256: 94084b86d3c475fd3e2c8acfe3f1506f39fa28164b125268c582858217110654

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