Malicious PDF — malware analysis report

Static analysis result for SHA-256 e295c9ea80ab1a66…

MALICIOUS

PDF

76.9 KB Created: 2021-04-30 10:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 256e30a187b2950903d0ba8ca99b4d7d SHA-1: 42b6fc91314feadfe994dfa179badcce54799178 SHA-256: e295c9ea80ab1a664749645e1b9ce87d64b62e0c8a45dad41a420f5bb4d14e4c
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://jumiwimov.ru/strik?utm_term=wildgame+innovations+trail+camera+troubleshooting PDF link annotation
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/furegojedexukux.pdfIn PDF document text
    • https://cdn.sqhk.co/gonaxetuped/3rgdjfX/bixby_voice_assistant_commands_for_smart_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/CSDhiAQ/3d_pinball_space_cadet_pour_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_601734653a6ad.pdfIn PDF document text
    • https://tomavibevojivow.weebly.com/uploads/1/3/4/0/134016690/5cfd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_600d48701e1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_606bfd2893d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_6013c68681a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_602616153d178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/724a259a-87a8-4723-a623-c6e8774436ba/bachelors_in_management_information_systems_salary.pdfIn PDF document text
    • http://wesatume.atwebpages.com/bajoxolije.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/bovetogibiwakerolazujajej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1671be3-18bd-41d1-a5ce-611b0c7e5c17/82440756680.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_off0000eb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 5564 bytes
SHA-256: 23ad63ae28e2a2785bd6329becb098b4786430ba3bfe763b492bfe0d343d9b9a
font_01_sfnt_off0000fdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF7 11396 bytes
SHA-256: 80f9a8fc0cb1596db09a9a0609fda1337991129e10407fad964eac822980d012

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