Malicious PDF — malware analysis report

Static analysis result for SHA-256 96987b2de3e3129f…

MALICIOUS

PDF

74.5 KB Created: 2020-12-26 22:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7a731e2f76e4582b738586f22989369d SHA-1: eac14e8f40b7727b84c8385b4598ed786b97862a SHA-256: 96987b2de3e3129f9b0e1b354f00771aa381cd4f141d89d784914bc9663b6cc1
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, with the primary suspicious URL being 'https://traffine.ru/strik?utm_term=get+followers+and+likes+instagram+app'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/strik?utm_term=get+followers+and+likes+instagram+app PDF link annotation
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/tunin.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/7611659.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/chbtujb/last_shelter_survival_mod_apk_unlimited_diamonds_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/ghZjfgc/i_might_just_risk_it.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/hizwQhf/ligubonag.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/0b1de40c-23ff-4bb4-b48c-a7c9341f8e78/51029722387.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/canada_food_safety_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/mayfield_village_ohio_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/bachmann_trains_catalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acef62b-df25-4dae-816b-e70284f1d119/72245390470.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/98838463690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d6ac13-4d30-44d8-af2f-299757dd6fec/bodomaziwasolajuwibakenuz.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_off0000e405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 5548 bytes
SHA-256: b53c4064588e88583463f2396fe6809bbd0970f3048dbc19a14518bb18c00eea
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 11368 bytes
SHA-256: d0411ccc27969eed6831b4466255fb6701b7dcd8cd08cade1680ca9e731f0263

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