Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60a883da4c66237…

MALICIOUS

PDF

62.9 KB Created: 2020-12-19 09:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 134c44e89ecac1c6927d3ade9b5f48f7 SHA-1: 1e9bf7be2d8b8f4efb6d3f172f86165fba72f220 SHA-256: e60a883da4c66237e42131465f8aae1d6d09ea020878499f057c015ced55f7ed
156 Risk Score

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 0.9998

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://trafffi.ru/123?utm_term=paraphrasing+practice+worksheet+pdf PDF link annotation
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/1c1e441c2da2.pdfIn PDF document text
    • https://wokubevisaroka.weebly.com/uploads/1/3/4/8/134882568/1c4cecbe.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/zigatut.pdfIn PDF document text
    • https://puxusatorujebi.weebly.com/uploads/1/3/4/7/134749887/kiweboropur.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/tejazilax.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/604608041b44.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/fuzewageketuvutanod.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/5fc2be0b0b6b03258f416bd5/t/5fc766a82ac13f1ee9bab237/1606903465500/update_software_iphone_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jedasaber/smallville_season_9_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/54884821700.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f169085bf90c0efd4cbb/t/5fc53692f3de5e49b50e814d/1606760082396/85064130013.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/amelia_earhart_adulthood.pdfIn PDF document text
    • https://s3.amazonaws.com/mogelebolep/bobesuzapopolazomesafule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bcbe6609fd0ee7b2a963/t/5fd09eba26d54b3c06d6a46f/1607507645298/75626481447.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/identify_polyhedrons_worksheet.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_off0000b667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB667 5540 bytes
SHA-256: 7bad77de5141fa157f40f2eb4db7bbaab527d88d8da7721eec080ecc2a60de82
font_01_sfnt_off0000c951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC951 10452 bytes
SHA-256: 424675eb2859ed71ca03e7ab3523b4ef117ef3ef7abe4fe7e21758715e71d412

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