Malicious PDF — malware analysis report

Static analysis result for SHA-256 e734d3372cb365ce…

MALICIOUS

PDF

93.0 KB Created: 2020-12-06 13:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c71fa4aea05be49ce7085af415852f96 SHA-1: 0fd2ab08f226fcc2e28d5b3f3ba4514370272383 SHA-256: e734d3372cb365ce5e2be0cc9d4a2945be684d752f72cbef305c564820f5549f
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://traffine.ru/strik?utm_term=how+did+buddhism+spread+during+the+tang+dynasty PDF link annotation
    • https://sitixibabu.weebly.com/uploads/1/3/4/7/134749551/6382665.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5341355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10b71bdb33045eec31c8e/t/5fc18c659ee0f32b878d98a3/1606519912565/vikilajanufejinozujawul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bb2c88c99b6d37a6398e/t/5fc155e73570fb44d1348124/1606505961303/10990943993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47894e31-a4dc-4258-913c-29c821148082/22320044967.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc546b6a13a450bab114660/t/5fc7e5a866d87000d3c393e9/1606935977117/54602737987.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51bc33dfdd95b60f05278/t/5fc934f240f01d111c1f378e/1607021810969/18391581843.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/basupibunisino.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28c84be9b6939511547ef/t/5fc4ecc9a97599144e9359e8/1606741196723/santa_claus_agency_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4daea8787e879898531d2/t/5fc5c80ebc819f1cf4a12b86/1606797326433/68621325245.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc575ad2bbd740658254770/t/5fc7f022df14a83315450be2/1606938658548/97312624862.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://afe.easia.columbia.eduIn 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_off00012baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAA 5636 bytes
SHA-256: b0b8e280b6655bea5130975510744e8b235d5528ab4e221cd95d08af05d854f4
font_01_sfnt_off00013eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB3 11468 bytes
SHA-256: e34ecfb6e4525c5768401e7471b744e5f91631e8f9047f09e30067fd26509025

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