Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82fc51ac41bd7c6…

MALICIOUS

PDF

65.2 KB Created: 2021-01-09 06:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 49f6f134ea7086c9f3f7c843972fdd22 SHA-1: da5f755e84cd81554b09cb8e0acabe9af5ce5dd9 SHA-256: e82fc51ac41bd7c6392490460f95f88ad0f7a63a1c5b65120a2d54156193b5d5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded external links, suggesting an attempt to redirect users to malicious websites for credential harvesting or malware distribution. The presence of external URI firings and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

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://traffking.ru/123?utm_term=the+guard+kiera+cass+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fd6fdb2d59a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5ff2278bba912.pdfIn PDF document text
    • https://lodovanu.weebly.com/uploads/1/3/4/4/134403978/debikasexaruru-zujamabu-zeposabawonir-pumejevabixad.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/wizubuled_lapidoliv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f955c8b628f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369903/normal_5fedc7f09e335.pdfIn PDF document text
    • https://tofojuduvebexaj.weebly.com/uploads/1/3/4/6/134650498/226146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416923/normal_5feb26aea27a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fcf9cac81fe0.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/fowezugebava-tejezelun.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/5522365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_5fb5d5277c462.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/fuzafuzeruwit/stomach_exercises_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/carrion_crown.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/tozikijokenivowizeloki.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 5400 bytes
SHA-256: 508b382325b49ef60041f1f807cc9a53217bbf833bfe3fa3967206951f04dd0d
font_01_sfnt_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 9444 bytes
SHA-256: aafd71b4386d7d15106168d7860cdda160153ec9b249f25f58c30d8c2ecc734f

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