Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4dbdaafef8088c6…

MALICIOUS

PDF

68.5 KB Created: 2020-12-14 05:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 227a0f76493d977cfc6c5f4c710c67bc SHA-1: ab226ee68de394dbdac2242402c65cc98d47d75a SHA-256: d4dbdaafef8088c6133044213c14524d84a2bc522250ed549e3979376dc49eee
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to redirectors and disposable hosting, such as 'https://traffmen.ru/wb?keyword=carrier%20thermostat%20manual%20tp-%20pac01-%20a' and 'https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/bawukexunuzadij.pdf'. The primary purpose appears to be directing users to potentially harmful content, consistent with phishing or malware distribution schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=carrier%20thermostat%20manual%20tp-%20pac01-%20a In PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/bawukexunuzadij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_5fae1e4cc6179.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/1177329d8c6904e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f8c147427085.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/55d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f9d07da339c7.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/40a5e5.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/3173209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384642/normal_5fce07d29da5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f9f2d70f186a.pdfIn PDF document text
    • https://fefujosiniw.weebly.com/uploads/1/3/4/8/134862858/7424adbaa.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/5fc54dfe3dfdd95b60f249af/t/5fd153c7e85d31265ad3b215/1607553991543/2959106388.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc009dd8787e87989674e7e/t/5fc14d9c4f983757200fded5/1606503836928/naia_softball_game_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/orquidea_negra_hq.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_off0000c0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D3 5304 bytes
SHA-256: fddc726f4295ff7a602b941c81486179bc3c28fe138960a7058fc81ace99d7eb
font_01_sfnt_off0000d2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 10216 bytes
SHA-256: c6bfa0a49dd5d402c6c9ac8d342fc6b8d8e226f55a72e9b4f44d75c704c1c0d6
font_02_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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