Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f4ee6f82374d6b…

MALICIOUS

PDF

79.8 KB Created: 2021-05-22 18:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33e9780fe3945061e0a1c30393c670f8 SHA-1: dc8aa34e7f2d2c87fca69efa85ad61bbad6f55ab SHA-256: 65f4ee6f82374d6b91155957ad23b08faca96a39de6b46821b35a922689e2d85
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 0.9996

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://jacksth.ru/strik?utm_term=what+pans+should+not+be+used+on+a+glass+top+stove PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472503/normal_6036b06ab8845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_6006b794b9e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_600afb0c9cee7.pdfIn PDF document text
    • https://wapavamo.weebly.com/uploads/1/3/1/6/131637186/9511324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_604654f5daba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5fda3b4f24c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_604049600e12e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5feaf0b2abb95.pdfIn PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/d6e958f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_602e7343d9a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_606decae5f727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fe8c79e01967.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/boxalewijim/scary_stories_to_tell_in_the_dark_full_movie_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254148e5-1d45-4f0a-947e-21cb4c8d7214/pobedopagupunififavido.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/1425572060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a728b88-e2e3-400f-a925-a0f039d52555/black_and_decker_dustbuster_cordless_lithium_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331522b6-09fd-4779-acd7-bd382ab001bb/31351089080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efbdfb39-2e2d-414b-9dbb-e76d883763ac/sennheiser_hdr_180_wireless_bluetooth_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/resurikutokizabijexivutum.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/39836874660.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/33072897876.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 5336 bytes
SHA-256: ff3ed2660ab44e7fb959131044efe7561a29fc15d6aa54a6e866c5aef91312cf
font_01_sfnt_off00010336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10336 2044 bytes
SHA-256: 28336a0cb3f8e641e75945af3d35324194abd932e21d2bc38800f63db353b10a
font_02_sfnt_off00010ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA1 10652 bytes
SHA-256: 06fe7a2930ce783e90bfd22a36ab7876953187f9f50558e79c8b7dba270b7cc8

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