Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57c6575ee49e0f2…

MALICIOUS

PDF

80.9 KB Created: 2021-05-24 11:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b1ac4998384a61689e7dbda1caa6d85 SHA-1: 74a4998e13ec3fce3f52a81c49c4e1a876e1f29c SHA-256: b57c6575ee49e0f2dcbacb18b177df898c2d2c985b8b170f63a88fdb946f3603
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://soxebez.ru/strik?utm_term=motu+patlu+cartoon+all+movies+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484818/normal_602790cddcb3e.pdfIn PDF document text
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/9066931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_6039fa617e479.pdfIn PDF document text
    • https://savejoxip.weebly.com/uploads/1/3/4/7/134722189/zowivakabalobuvo.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/3924134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417534/normal_5ff8f4a5be5f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_602bef6d6539f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486035/normal_605ff264c9bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_606cb7a22702c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fe8b77c2d9f1.pdfIn PDF document text
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/juzejezasu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcae91ba80fc.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/xifabilejilab/96782206741.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/weber_spirit_classic_e-210_2-burner_gas_bbq_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/51072073966.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/32859442192.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/long_division_worksheets_4th_grade_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/tajidasumowejolulikaj.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/nordictrack_c2150_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/potexevadet.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/90509733422.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/process_costing_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/visopa.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/53454468264.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/siwerufaxaravu.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_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 5144 bytes
SHA-256: b1243f95a167e0b20b43035811e91f68abe241a85a39f0e1c4848111558a5bee
font_01_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 11244 bytes
SHA-256: 0368e94d5b5650b840c11f67064ea0b45b8bba570e67ed72cf8a5c88a07e8ec1

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