Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f33b1e6753ea72…

MALICIOUS

PDF

84.2 KB Created: 2020-11-29 05:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7875df169691652b679791489cffda0a SHA-1: 1edf3eb342593a48c142dc67d480439c556c4d3f SHA-256: d5f33b1e6753ea72096b9a1142642e2378d8475c9b67f1bd6fafff049c942ffe
214 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Airpods pro manual', indicating a phishing or scam attempt. The presence of many external PDF links suggests a link farm or redirection strategy to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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?utm_term=airpods+pro+manual In PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/514e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5fa7c4bf209c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_5fa3c668243db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f9088c2393ed.pdfIn PDF document text
    • https://fafofezun.weebly.com/uploads/1/3/4/3/134338513/nakipigakazus-xufozafi-gafigotuk-fuxojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5f9ce1b2e2f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f97802d3154c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fbc8cd9d0915.pdfIn PDF document text
    • https://mologikonazo.weebly.com/uploads/1/3/4/7/134706863/tegizewogakiduv.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/1843133.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/xepilala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f8e81447f8eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f88450dee2d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5f99e24811332.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/fb9f7f1a-655f-4c37-9d51-3de5502f6514/62065182760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c249ba-7d79-4974-89dc-004544654626/jasper_reports_format_number.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_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 5092 bytes
SHA-256: 9797ba27121e418c90fa01492d48fa80b037354c2cad78167584816331bad123
font_01_sfnt_off00011d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D80 11420 bytes
SHA-256: 487effdc610342c483f8f69f92cc76b8859823f34a52bb2ed97f2090db9420e0

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