Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0ccbbb31b9580b…

MALICIOUS

PDF

70.3 KB Created: 2020-12-19 21:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 746e1aa2e90af48f611bc05c4e6d10ae SHA-1: 9b0f3484841954451dbe472becfd7805deb5ee88 SHA-256: 5e0ccbbb31b9580b921c2f42758d4f6356ea81a2829e5109aac6a412c986d412
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting services and a known malicious redirector. This behavior is indicative of a link farm or phishing lure, designed to drive traffic to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

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://ggtraff.ru/strik?utm_term=csr+racing+apk In PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/bexanusodesexez.pdfIn PDF document text
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/boxepitafa.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/zakigezulateb.pdfIn PDF document text
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/8844458.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/xoveta.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/kitoxumiso_nuwojovekuxaza.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/kixitajixo_zamaw_zobajur.pdfIn PDF document text
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/vaniv-gudoga-basavurugipuwa-zijod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_5faf1570e5b36.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/089a3cd3-0504-43bb-a688-d3710250a3fc/58322221829.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c73cdf132613bbd6778b/t/5fccfbc1e43f2b00a8aa6832/1607269315111/77685299363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef94fc6-04f9-465c-a5b8-5e3413bf088f/gufobuloruwoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c3c7a3-675c-49d9-b858-77354a63d144/why_i_want_a_wife_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be152aa-3342-4ded-ac69-71ccd8734ef4/66066769624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbba144-ce78-41bc-8682-af5736c50886/boyce__diprima.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_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 5040 bytes
SHA-256: b41443c378ff93422f34cba231c5259ac740c006708cdb91c9f800ffd8c3647f
font_01_sfnt_off0000e9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FA 10072 bytes
SHA-256: 20fbe48bcf5c338d990ffa3eeeb2c48d0ab44e3ae35659b3be9ff858f574fade

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