Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01a96eefdddfc2a…

MALICIOUS

PDF

68.9 KB Created: 2020-11-19 07:30:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 28bde208aeb6de595a3c25999e8b04bc SHA-1: 094254bd88153d21e52aecb63cfd8e419d1c98b9 SHA-256: e01a96eefdddfc2a8605a51aff819a7d151004bef3cdaf1737dc1441cf00c6c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by a machine learning classifier and ClamAV as a phishing trojan. The embedded content appears to be malformed or obfuscated, preventing a detailed analysis of its specific actions, but the overall structure and detection results strongly indicate malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=craftsman+hydraulic+jack+repair PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5fa634afb83e7.pdfIn PDF document text
    • https://fitetavixanara.weebly.com/uploads/1/3/4/7/134721375/tepejaxi-luxofax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5f9ecc6119eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fa42f6b0d0a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f8fd3310b402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5fa1bd781c357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jesidofefe/seliwimoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c8b646-b833-43e9-bb56-5ee87086179d/wasipuvavoliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c8de7b-5e66-43cd-aaba-c6888a15a49c/68102118805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fe9675-39a0-45c8-8ded-3699a985572f/hp_envy_7855_operating_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/10786781881.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_off0000c4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C4 5432 bytes
SHA-256: 14310f8563fff6e1d2a8e2d1a6fe8782278d6125915769ace8aa60224bf5724f
font_01_sfnt_off0000d713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD713 10016 bytes
SHA-256: ba977a285bc56aae36e20e0c82ba1912267e6e14669396e31d29c12886ff401e
font_02_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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