Malicious PDF — malware analysis report

Static analysis result for SHA-256 e363b2e7ea8d9398…

MALICIOUS

PDF

82.4 KB Created: 2021-05-19 00:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4aedeeaca55441084ca2fe7194c8666 SHA-1: c2b4060e6a416da6e4e936ef660cdc66b47cb20f SHA-256: e363b2e7ea8d939868486b30959792183a11991ace0515497f7c6335a329d5e4
96 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://botokaw.ru/strik?utm_term=how+to+speed+up+upgrade+time+in+clash+of+clans PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477376/normal_603e2cea8cb26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc79172cbaba.pdfIn PDF document text
    • https://lirodute.weebly.com/uploads/1/3/1/8/131871659/demajufave-xogiwesafosafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463306/normal_5fe4c4661cbc6.pdfIn PDF document text
    • https://konevolog.weebly.com/uploads/1/3/1/6/131606720/48add4204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382631/normal_5fcbaaf8cce54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420020/normal_60074fbf8b975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444646/normal_6011a576f414c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_600c645683295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463002/normal_5fefb3263f448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_603205176e466.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/piwurotodomesiziv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_605308971ffba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_5fd6440d4e026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_6032a6cc9872c.pdfIn PDF document text
    • https://paxowamowutujaf.weebly.com/uploads/1/3/4/3/134322095/5012200.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e3159c-015d-4223-a3d8-f981fbcd43b4/doziduvilomofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709c6a69-ae6e-493c-b2e8-56218a20dc46/garmin_vivosmart_4_activity_tracker_-_black_large.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5848c826-a842-43a7-868d-67555bc269d6/turala.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000ef63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF63 5624 bytes
SHA-256: ca131c4d20d4a824deb68fccce40c806ce3359d9e4105652a4235ecc567db3a6
font_01_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 10548 bytes
SHA-256: cf45f769b211362f5a63fb663e431b096bfc195803cfda0c4bd3355d2af0a167
font_02_sfnt_off00012695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12695 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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