Malicious PDF — malware analysis report

Static analysis result for SHA-256 db17db0370b74167…

MALICIOUS

PDF

83.6 KB Created: 2021-03-15 10:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e8b2b207700fd339ad04057dbf56525 SHA-1: a7f6fc6e13e285a8fbeee5061eba000dafabc53d SHA-256: db17db0370b74167f474a487d430401f404eee341331ba9d0116093d9b3fe987
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 0.9993

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://dafemum.ru/strik?utm_term=index+2020+india+rank+pdf PDF link annotation
    • https://cdn.sqhk.co/dimowitop/dFum0EZ/neduzepafupaxifexufowam.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/neFgeot/como_jogar_exploration_craft_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/bjfiajd/popowafufimaxol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453333/normal_5ff2e278a01eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_600b47d887748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_604eb5ed378c6.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/dlihigo/mysore_mallige_bhavageethe_kannada_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5fefc1d63f7de.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/roware/94477224837.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/60010396624.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/ruvemibudinejovasuxojev.pdfIn PDF document text
    • http://jegozejixal.epizy.com/35866387841.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/vupigiwutukubadusivatu.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/openhab_setup_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/74792429990.pdfIn PDF document text
    • http://fagufobukabovu.epizy.com/femabopulu.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_ac2d8d656e8a44ffbb0d225631fce3c4.pdf?index=trueIn PDF document text
    • http://sezulezaba.rf.gd/vufesomeduved.pdfIn PDF document text
    • http://lanelasopuju.rf.gd/decrease_size_acrobat.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_fc13f19f59ff4946b38661be5e33e859.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/nebimavutofi.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/vutuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/errant_hunter_soul_gift_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/66415388193.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_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 5168 bytes
SHA-256: f89fe9461090651bd771abc7a31c6d55f350fcf617f623c6af16a7fed288acc6
font_01_sfnt_off00011b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B92 11076 bytes
SHA-256: 1d44a060824e10f616282b65c0e7311f1506bd249a32640f2ba60adb1edc11ad

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