Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed76c4d77d12e90e…

MALICIOUS

PDF

73.4 KB Created: 2020-12-17 15:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e87e591b63fc5c330367249dffe8f8e SHA-1: eef3f41428cd38a1e5e47834645522c313b4ef70 SHA-256: ed76c4d77d12e90ece13207426d7175fc8f1e635bf8e29bec4e11d83ab4b8ab6
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=recycling+sign+number+4 PDF link annotation
    • https://tugagifozige.weebly.com/uploads/1/3/4/2/134265986/e0a3345bc5.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/xugabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_5fbd300d41003.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/pusori/glitch_photoshop_photo_template_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ce785426f52a30dad215/t/5fd6c062ffab5d3c5608c54d/1607909476096/benefits_of_using_social_media_platforms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1954caffbf90a66ef50b6/t/5fc599f6173fb5383b641f27/1606785528925/vagulajefoga.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/79852408317.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/chuyn_file_thnh_file_jpg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c36ae5c7695ca9b45588/t/5fcc8bde7ae85b53b28bf7df/1607240672824/punjabi_numbers_1_to_100_counting_in_punjabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1213a7-8ff2-430a-b925-8086d5f4380f/wumimomepurid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56d0fea4a794d56639523/t/5fd6f02effab5d3c560ef052/1607921711244/reject_proposal_letter_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a1731c8c74131452292d/t/5fc8fa2856f72563b2d1379b/1607006760545/38661175752.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_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 5244 bytes
SHA-256: 9ec8177ea126db34502b837731b4b3e084da42bc742e48440b510a38e5380617
font_01_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 11800 bytes
SHA-256: f55dcc0ddf37c984a4f53945a177def43902e6a171598be996d701f7b765e5ee

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