Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff8b628065a91f5…

MALICIOUS

PDF

73.4 KB Created: 2020-12-25 17:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5a7e7b837cc7f1f6c2e7bbf9313d9f7d SHA-1: 188ce3c8d6a176f758b6ccfb95a611445308e027 SHA-256: fff8b628065a91f5bc72e286a87e7a75358049828950ec459b389b4ae957a1b6
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 0.9997

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://traffking.ru/strik?utm_term=pew+pew+meaning+in+iphone+message PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387054/normal_5fa65218d14c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fc6295eb07f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fcd205d0f761.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/1322215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f9f5a3729ddd.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/jujixadofegesirade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5fbde5b9803cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9519758e8ac.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/8266021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5fcecc2c4482c.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/e1a0b00f-363c-490c-8ee5-d324146977b8/visual_guide_to_elliott_wave_trading_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab95f67-12ef-4bc0-a00b-a3b2bad74cc6/the_closer_i_get_to_you_lyrics_franco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3631f070-b0a9-4e8e-ace1-006bcb6da2a5/14867350423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859cf420-b6a7-4dbe-b70c-6a916a46889d/27815801651.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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 5196 bytes
SHA-256: cd82a588aeb389cdcd82b53ac97af861cb889bc4c3640a258e17bcd063df7e6b
font_01_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 10348 bytes
SHA-256: 0c7ec10ab4317b481e87fc17a3bd44e5dfde952f575b7fec239256881c96b4e4

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