Malicious PDF — malware analysis report

Static analysis result for SHA-256 96db60584aa5e88f…

MALICIOUS

PDF

85.9 KB Created: 2021-05-24 20:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 22d882d6cb0a986d9268163c50a298a5 SHA-1: 8b1d88dff8a1e7af472d931f8a3617eebef0b326 SHA-256: 96db60584aa5e88f580cc60bd04ec44b1e1ec3ec94f6f389227de2a00bbadd0b
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://baarspo.ru/strik?utm_term=ghazi+university+prospectus+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428335/normal_60277f38086d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481282/normal_5fe3f637618cb.pdfIn PDF document text
    • https://jimutovila.weebly.com/uploads/1/3/1/8/131856698/jabaworajafix_tolepagito_jajazujon_jijamipago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5fd7a265bb1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_601fa7d39cfed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403415/normal_5ff8486b828da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_60663635f1613.pdfIn PDF document text
    • https://magenudelekoj.weebly.com/uploads/1/3/5/9/135975171/7051837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fceebdfa8617.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://s3.amazonaws.com/gogunabones/dorinur.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/tadubavegosuwawegulunaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/bibukolusomigeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b899f3-6741-4f6b-a7a1-ac5cff34d17a/jibuxojijojizoripe.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/mozinujufupewusifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f65199-070d-4db0-9089-d3bf9f643889/best_motion_offense_for_youth_basketball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82bfcabe-e85e-4ef4-802c-3dbb89b90d09/2073155139.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/namogi.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/81165613240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec477d7-64a5-4593-aa5b-b6b3cd5c7f7f/firovezavi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 5612 bytes
SHA-256: 29df70c14b1c8b9d2abc99a1e27f6c839e67ac690bd26a3633a7c0e3a28bae10
font_01_sfnt_off000117a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 10600 bytes
SHA-256: 11fc7ae57b62bb533d79da2cccbe512b557083c50162bcd1d140492be7c63272
font_02_sfnt_off00013bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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