Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0f13b02e0e17f9…

MALICIOUS

PDF

76.6 KB Created: 2021-02-23 00:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca7a9ecf72bd3a5f5558de6967ab166c SHA-1: af74ecd6280503a52914d52df93f296d12cc3db1 SHA-256: ae0f13b02e0e17f9b871dfaafb74fa9fbc2672af2be023b3e0f667d2586f54ff
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are structured as SEO-optimized links, suggesting a link farm or phishing campaign. The primary URL points to a Netgear WiFi extender reset query, indicating a lure to trick users into clicking potentially malicious links. ClamAV and ML classifiers strongly indicate malicious content, specifically a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/123?utm_term=how+do+i+reset+my+netgear+wifi+extender+ex3110 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413456/normal_601a32c9e6353.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/4282768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_601e86134cd1c.pdfIn PDF document text
    • http://povutigu.22web.org/beekeeping_project_proposal.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/3819094.pdfIn PDF document text
    • http://mikrotikwizard.com/6589575355j8owg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383132/normal_5fc9096e7edc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fcf36006110f.pdfIn PDF document text
    • http://bigpleasure.ru/pleomorphic_dermal_sarcoma_case_reportm7lji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471514/normal_5fc894da87189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_600cbce8e287a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478133/normal_5fdbe59480d4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500189/normal_60051604ead94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454281/normal_5fced49ac775f.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/muvusikexibosnx6eg.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
    • 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_off0000dffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFD 5564 bytes
SHA-256: 883e3bd5ed8d4ba76dd6e4653d97010ac9e484b36459adea3e2f10995de75d3b
font_01_sfnt_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 10600 bytes
SHA-256: 424a6843f6c9d52a2ffbc8d358f459f94ebca9a7cfa02a943762626f357fb52b
font_02_sfnt_off000116f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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