Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74c03782222e794…

MALICIOUS

PDF

76.4 KB Created: 2021-02-15 18:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1be138d810e615b3a9059a52d773d508 SHA-1: 9e251c034075f4a43c59fe3b8ff1606d9fc73394 SHA-256: d74c03782222e794670a9ada18d9cc487b707047b057432bfb28ce7db84e1e69
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support this assessment. While no scripts were explicitly extracted, the nature of the link farm and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=cravity+jumper+lyrics+translation PDF link annotation
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/zubasapez_kijapuba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5ffd248b794d2.pdfIn PDF document text
    • https://cdn.sqhk.co/gutipefu/hTRuXqo/fios_tv_one.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/13344ee99f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_5fefdce6843be.pdfIn PDF document text
    • https://nibivesulekot.weebly.com/uploads/1/3/4/0/134017222/rulasame_katiw_babav_kijut.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/1c04ca92c.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/d0c0fb2f410c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_601ffcbdd24d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_600c19d2e2114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5fe10821150db.pdfIn PDF document text
    • https://rulesamafov.weebly.com/uploads/1/3/4/7/134768786/razivujesatavuxikog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418401/normal_5fcf043e9e6b4.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/9gghggg/how_to_iron_a_dress_shirt_with_starch.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/9499873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 4064 bytes
SHA-256: cbbc81154043610040d822b21bceef915cc0948190ba27cfb4d240e20a3ca1cb
font_01_sfnt_off0000e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 5220 bytes
SHA-256: ae438b0eee05efa73eeb3d38fa4385e7fd9350eac990baf2d5c9cf36d0242378
font_02_sfnt_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_03_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 10364 bytes
SHA-256: 59bf91cde5a84bd0cfed3060b8cc622c0ffe2500dd51ec13733735e7784f4c5c

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