Malicious PDF — malware analysis report

Static analysis result for SHA-256 9287b411a3250b0c…

MALICIOUS

PDF

70.1 KB Created: 2020-11-17 01:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39fbaf49d6cf09170511b38952d4a0ae SHA-1: 5c6d22b6d8077e31efcae1fc4e8e97391f644147 SHA-256: 9287b411a3250b0ce1988c222a835213eb087bcc40d7179dfab96cb10a941ccd
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=halo+bad+blood+pdf+free+download PDF link annotation
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/zusofesumudaf_kafimowesigomo_dokosajezobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f8873ddea6b1.pdfIn PDF document text
    • https://wuwifure.weebly.com/uploads/1/3/4/6/134647121/libumojiwofagifimebu.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/8622273.pdfIn PDF document text
    • https://kisogegexene.weebly.com/uploads/1/3/4/3/134374262/8047536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5fa33382e5a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_5fa6203f33817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/30aa5e49-6eb9-4e68-93ed-2b1c048589b0/86059281372.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/xozodaxatapevexumub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999f1afb-cbb8-42aa-8a09-b3cca8a64437/12143232877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fb27a7-741c-45f6-a2fa-c3960b1b0da9/sid_meiers_civilization_3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05ec26e-4999-4a22-950b-ffee72fec234/vigikimerelulenelejaje.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/grigori_grabovoi_knjige.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63E 4712 bytes
SHA-256: 175195f6c30794a7f73c8fa1fe5236b79051f77d2f3cda0701bd7ec10ac425e2
font_01_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 11584 bytes
SHA-256: 88eddd2e710d875b89e2731518aa1be1298937c1762213589672e9cb926732ee
font_02_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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