Malicious PDF — malware analysis report

Static analysis result for SHA-256 842023eeca5b2abd…

MALICIOUS

PDF

82.3 KB Created: 2020-11-24 18:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f19a47e4a1028ed0836c8ebb603d318 SHA-1: 263ce39845c92084c8099665ea5fc67f7c9d34cc SHA-256: 842023eeca5b2abd8609fee09eebade46073c2cbc27aa5ee2d21c0e3afc85bb7
156 Risk Score

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 prominent URL, 'https://traffset.ru/strik?utm_term=john+wilkes+booth%2527s+brother+saved+the+life+of+lincoln%2527s+son', suggests a phishing or redirection 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=john+wilkes+booth%2527s+brother+saved+the+life+of+lincoln%2527s+son PDF link annotation
    • https://bilemupu.weebly.com/uploads/1/3/4/6/134654663/5048539.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/2880308.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusagi/tor_browser_for_android_alpha_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/mowibamamefemuponili.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/83226995721.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/bodisanil.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/gta_v_xbox_360_achievement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5c5c61-5aba-46bb-93cd-d3199ccdde7b/maloxejuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/sonora_middle_school_springdale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac71152c-af23-41d1-8c75-ecb97bb787bf/user_manual_amazon_fire_tv_stick_4k.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/best_monk_build_pathfinder_kingmaker.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/67019183423.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/95944818669.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_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 5488 bytes
SHA-256: 17be6872c52b853b4736e975e7fed47ba4ecb46b5c68a13d0def818067d60805
font_01_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 10812 bytes
SHA-256: f905b612778910bcf4566dc40b7c7ca1371fdaf819cc136452e8710e698311dd

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