Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f424dafeec79b09…

MALICIOUS

PDF

44.6 KB Created: 2020-11-07 14:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f01cccd33f0dd0cc5e74f8d9c0b47400 SHA-1: 962dcc327a23e3ebd80d93782d976cf7ac449b6f SHA-256: 6f424dafeec79b093f8f463a16bd96da6091571d1856323cdeeacbf3cefc36f6
104 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 an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?keyword=smash+dude+2+mod+apk PDF link annotation
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/9489200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5fa23684a6d84.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/7261632.pdfIn PDF document text
    • https://bebefezagogu.weebly.com/uploads/1/3/4/3/134372182/mametetako.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/fapaga/xejaxek.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/ethnic_groups_in_conflict.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117cbe78-e89a-492d-aa8b-8f2fdb09e19d/silence_on_the_wire.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/zojinakegitudatajak.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/15659950475.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/gogefixutomofej.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/simpsons_tapped_out_hack_no_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e495fd-942f-4511-aea0-dc4397ac9cb5/vebakakez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9718297e-1e3d-478d-9b5a-86dd7305697e/12093171841.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000084d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x84D6 19564 bytes
SHA-256: 7c5a3d23abcd24a122d1d91e8573d94ef77d90325e6c2d3e58ae45ae35bd40ad
font_00_sfnt_off00004bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDF 5372 bytes
SHA-256: f7e819842eb985715bd0ca7d5bba8de2cdd03275179d1be256c5728aa7a73e85
font_01_sfnt_off00005dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 11244 bytes
SHA-256: de1baa8a51e46445825d8c7bf7445a962a0d0017bbdf87da0ec72bff5adde160

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