Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed21c66ed106170…

MALICIOUS

PDF

77.0 KB Created: 2021-04-28 16:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a14fc4c2356050c4a5a857bb78f585b2 SHA-1: 568a6bbc04752c7867a6b6a9096c4cbbf9261e47 SHA-256: 1ed21c66ed10617019c02f4b45b398275575da05cbd7b38c54abac586026a2e3
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 0.9996

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://nipisod.ru/strik?utm_term=journey+to+the+west+oxford+dominoes+pdf PDF link annotation
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/zatudew.pdfIn PDF document text
    • http://jejederepox.medianewsonline.com/vinovavonon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fe4123f7a54a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_6053278c82cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_600f76ba330a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503387/normal_5fc7194fd11ae.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/najexivikafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_5fe4b57d8a588.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/e9be754c1405522.pdfIn PDF document text
    • https://zuxigazazopak.weebly.com/uploads/1/3/4/6/134688762/9e6dda0340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_605a1ed940d67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418188/normal_5fccfee47e955.pdfIn PDF document text
    • https://dufebekeromodi.weebly.com/uploads/1/3/0/7/130776386/migojupazogaj-vimepizelopavew.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/bofake/jituluwafodil.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/tetafikopozisujizuxaluk.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/27909775155.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/22780218520.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/types_of_electrical_wiring_devices.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/54359956501.pdfIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_5f873ff4eca9406d97d4c68f2751e46b.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_92dfc67e5bad49129d3130018c678cb9.pdf?index=trueIn 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_off0000d6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 5880 bytes
SHA-256: 08d4af49f1a8a20fee63b5c0d6ac4d4b846f20cf9991ba03f9ef75382e0c3280
font_01_sfnt_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 5292 bytes
SHA-256: 1d3692ff5e13257abbdc676f8b65b32e34f6e8ec882f94a25d9ef4da75bdd4aa
font_02_sfnt_off0000fd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 12380 bytes
SHA-256: e9a2fc1216f9f6356c5d4f64dc1e32927eeb6f48fb0e2ce0762e1a61669dd2c8

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