Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbf3cd364ffbb7d…

MALICIOUS

PDF

64.5 KB Created: 2020-12-24 02:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3f9c024db17943f46ead8b99cda32524 SHA-1: ec20e23bce759144ca8560568222987b2ec91532 SHA-256: 8fbf3cd364ffbb7daa3884f83c9beb740129404dea20768b4f3f463c5d0f63c1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://traffset.ru/123?utm_term=archangel+oracle+cards+doreen+virtue', is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/123?utm_term=archangel+oracle+cards+doreen+virtue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f8c877a6b708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fdf570ce8f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5fd7c7f6e5357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_5fad349b12e47.pdfIn PDF document text
    • https://tejubodefi.weebly.com/uploads/1/3/4/3/134351051/vafiwomulil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f8b843cccf14.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/zufojadibi/cute_july_2018_calendar_template.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/aradhana_naa_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/38710063765.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/best_ad_blocking_app_for_rooted_android.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_off0000b0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DB 5132 bytes
SHA-256: ee4941572c29c220e924eea0c5d4d4be06bf32996f8eeac453a2930057ff3db9
font_01_sfnt_off0000c243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC243 10904 bytes
SHA-256: 27f67f6f612fbeaec136e606cbdca091b6b82883d197975e926fcb4d3db3975b
font_02_sfnt_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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