Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8d7e971dabcbc8…

MALICIOUS

PDF

65.9 KB Created: 2020-11-21 23:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1ab294e67fc9654d57280a7c60ef485e SHA-1: d5909864b00a4eec9976cd84af255affc1a3e043 SHA-256: ef8d7e971dabcbc87c980e75d3135e254ca2c7aa07c631c2c203ae313b1efc51
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 0.9998

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://trafficel.ru/aws?utm_term=biarritz+surf+gang+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5fa5305195879.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/bb427ecff126227.pdfIn PDF document text
    • https://xixivejeb.weebly.com/uploads/1/3/4/6/134603549/dupobibenako.pdfIn PDF document text
    • https://biwurozijusuxux.weebly.com/uploads/1/3/4/7/134724143/108006.pdfIn PDF document text
    • https://numazerezawikar.weebly.com/uploads/1/3/4/6/134618887/d699634fb00.pdfIn PDF document text
    • https://tujebikofo.weebly.com/uploads/1/3/4/3/134359874/6733223.pdfIn PDF document text
    • https://fumadutukit.weebly.com/uploads/1/3/1/4/131437402/15d46d119932.pdfIn PDF document text
    • https://fuzifilagowiw.weebly.com/uploads/1/3/4/6/134698760/ribelurixedative.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/jefazaxal/the_landing_movies_renton_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/wigexifudepi.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/2003_dodge_neon_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/canara_bank_neft_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/total_drama_sierra_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/93573239186.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_off0000b113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB113 6172 bytes
SHA-256: 18f8acadcb2aff68281e4f5ea64443bdd81f9ce6ffc55f4babc095e1350c79fb
font_01_sfnt_off0000c66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66B 5004 bytes
SHA-256: 9a3c67ebc7e4155523f124727354ffe806ab4732cb94a1c3271d405316b7f962
font_02_sfnt_off0000d78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78A 10288 bytes
SHA-256: 18b0548d326d8abe1fd38b5995cfbe12617fce23331b975bac6efd5871ae4e38

Open this report in the interactive analyzer, or submit your own file for analysis.