Malicious PDF — malware analysis report

Static analysis result for SHA-256 b718dabafcd19923…

MALICIOUS

PDF

69.9 KB Created: 2020-12-09 21:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f6ee44446d5afef92fd101c3beb8bfa2 SHA-1: e62780389cef904ef3d35550b618e90556a52973 SHA-256: b718dabafcd19923e45045e9bff553de296f9c1103897df34adb01ae824eb9fe
214 Risk Score

Malware Insights

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

This PDF file is classified as malicious due to multiple critical heuristic firings indicating it is a redirector and part of a link farm. The embedded URLs, particularly 'https://traffmen.ru/aws?utm_term=crusader+kings+2+war+guide', are flagged as malicious redirectors. The document body, though heavily obfuscated, suggests a lure related to 'Crusader Kings 2 war guide', likely to entice users to click on the malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=crusader+kings+2+war+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fcaa4eaa746c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5fbb7ab0ab042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fa83e2529278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_5fb02ea524620.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/jetuzixizaveme-vilodudare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8b8238b46cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_5fad5a5645cd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411250/normal_5fc9381b4257e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fa2b3928ae5e.pdfIn PDF document text
    • https://wanizirutakel.weebly.com/uploads/1/3/4/6/134678241/komuwiratono.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://static1.squarespace.com/static/5fc15df1e9fc3622d5255c20/t/5fc95b6cf6102f0e5ea213ec/1607031661672/mikugaborosasukumurifemij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae65064-0ce0-43f5-abcc-3caf478b3a2a/esquire_november_2012.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_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 4964 bytes
SHA-256: 0e843aeb052b3b482f9f7127e0c73bf4bebb49060db2f60d198185604a653b26
font_01_sfnt_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 9844 bytes
SHA-256: e82f464f5b99f7b1524f5a6e7cd275eb24b52cb5fc230aa9fc1e004084222633
font_02_sfnt_off0000fc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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