Malicious PDF — malware analysis report

Static analysis result for SHA-256 375aecef2b655caf…

MALICIOUS

PDF

76.5 KB Created: 2020-11-09 21:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6641bc35234837ee076048add0e3ec7e SHA-1: d494f03d3f7b3ac630a22cc0adcb10d96343a6ac SHA-256: 375aecef2b655cafcaece88267e079109c2ad2d8b19ad3f87804725d3c5da7e7
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'facial diagnosis'. The presence of embedded URLs and the heuristic firings strongly indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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://traffking.ru/123?keyword=facial+diagnosis+of+cell+salt+deficiency+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f9c4b69ebde6.pdfIn PDF document text
    • https://zamelati.weebly.com/uploads/1/3/4/6/134652334/wamitekubopuviduti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_5f9c7bc096e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fa2f641d1c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5f95b0c191d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5f9c50763ce84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5f8bd5bb96a12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f8fea3d65a50.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://uploads.strikinglycdn.com/files/258021f9-de2d-4646-91ff-778d4f14e106/thick_face_black_heart_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d588f759-eb92-400d-9560-d19603705a8e/wazekafebaxinoguxosisibi.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_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 5072 bytes
SHA-256: 6ba65ade98e341be2ae68cb00fdc8e747443b4616271f219b8cb7b5042ccbba6
font_01_sfnt_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 10060 bytes
SHA-256: 2bb24821fce8be7fc16e42d5613b8324c9b1c92d60ac66866a916e433868ad1b
font_02_sfnt_off00011730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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