Malicious PDF — malware analysis report

Static analysis result for SHA-256 568ec4e4b6638b9a…

MALICIOUS

PDF

96.8 KB Created: 2021-03-28 02:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdba9fbe842be6d33592ecf0bb68e170 SHA-1: 529c6656ade4213beb0f4d0491e47d7dda03d5be SHA-256: 568ec4e4b6638b9ab5ebc86258407c3e042bf1c2218b07f0c23fe690cffa2b6f
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 0.9988

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://druttle.ru/wix?keyword=julian+newman+college+basketball+offers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372982/normal_5ffd7c9c61067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_605fbb648b2d4.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/ZPbjijb/felalolulapufor.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/0jhrHjg/we_will_rock_you_songs_ringtones_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_605f1ce546f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_6026fa367deab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369190/normal_6000228bdc56a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_6038ebeb9ab5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fd6520c15f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_601bfa4353928.pdfIn PDF document text
    • https://cdn.sqhk.co/xusikeko/xhhwEhe/facebook_portal_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_6038fe958f24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_6020ca8577b4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/24504608768.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_547f4d5bdc844b29af64ab07c44204b4.pdf?index=trueIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_94b826e0b72e4709a70cfa2ff1305666.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosipive/francis_report_citation_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/google_chrome_new_version_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/81000744275.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/kaniwumen.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/51848807148.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/32755573042.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/gavuda.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/vevor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13037 5368 bytes
SHA-256: c03ffa5b24d54bb1f6b9d3f39b29e36b1e1a5a9d26ec7829ccb8e5835c221eb4
font_01_sfnt_off00014277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14277 10800 bytes
SHA-256: 41fb21dc2e1897b5699cb882f07a56c667596acbbe68104c377c79f0e2870b93
font_02_sfnt_off0001675e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1675E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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