Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c77c019510a365…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 22:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 11679475f35abebc4460e7f19e9f6b30 SHA-1: aa27b52e40632a950fb234c88b278f795db9bc73 SHA-256: 07c77c019510a365dc7119f200e1521714e91e5303ba498d5d2d691c26cd55de
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The primary attack vector appears to be a phishing lure, directing users to the URL 'https://mezovuduw.ru/award?keyword=carranza+periodontology+pdf+download' under the guise of providing a document related to 'carranza periodontology pdf download'. The PDF also contains a large number of external links, suggesting a link farm or a method to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=carranza+periodontology+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462093/normal_600c371b81814.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fcecc881e0e2.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/i1z2IQC/fruit_ninja_classic_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/iTjbAhi/starcraft_deck_boats_for_sale_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499660/normal_6046ff1ae8d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_603008ded5af2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff65195c942b.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/hgNhixG/86052116925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489615/normal_5fe86b761fb79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_603c076d92e47.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/OhbgiXb/razalean_pm_ingredients.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_600ebfd5904ab.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jdifigw/videos_for_whatsapp_status_in_telugu_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60205cd775315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_99e7f7024c0042dca9ff98c9f79c0bdc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/6238660368.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/19621344148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5add668-18b3-4671-b9d4-34901c8520a5/what_is_meant_by_non_collusive_oligopoly.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/56380379650.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_ff9c64695d3649749d3be7583a8af79e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7d4d80-c765-4fae-aef9-e08e2b61258a/60737735013.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/pozemiviverobopuziladu.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/interim_report_legal_definition.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_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 5180 bytes
SHA-256: 6f71e7f8b172cee4d8bcfadeacabdb27dfa50704e5b1395bdde71ac08703c98a
font_01_sfnt_off00010375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10375 11776 bytes
SHA-256: 82857c453854da2efcf22e077d03c1ffbb7b782408115ee61b787ee25767461a

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