Malicious PDF — malware analysis report

Static analysis result for SHA-256 90eeacaf6c08a8b3…

MALICIOUS

PDF

68.7 KB Created: 2021-02-24 17:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e9943ae0dc59d7b1676127eff908ec9 SHA-1: 216193e43f6dac86a18850ac680375eaf5d1adc9 SHA-256: 90eeacaf6c08a8b32ac2cc0c7825d58fe5f66cdab37224a6353d4f397cc3862b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://leonvi.ru/wix?keyword=pokemon+rpg+offline+apk PDF link annotation
    • http://arbitestpark.xyz/are_old_kirby_vacuum_cleaners_worth_anythingh7tl2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_5fda2f81df010.pdfIn PDF document text
    • https://gakujoxabusu.weebly.com/uploads/1/3/5/3/135394689/fe375cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5fd86914e2ff4.pdfIn PDF document text
    • https://kixofugowewo.weebly.com/uploads/1/3/1/8/131872146/2c2b52c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe9f218ae09d.pdfIn PDF document text
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/7960093.pdfIn PDF document text
    • http://pujesuwidiw.22web.org/potuzarinow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_5fdec04579afe.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/7398619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_60199dd704cf8.pdfIn PDF document text
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/7394269.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/c3b88635e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_6011b045802da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimunumiwu.epizy.com/83757943905.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_off0000d0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C3 5108 bytes
SHA-256: 11a147e4ca1558720e52e60b58727b624c876127374497b3866ed6f94801f2de
font_01_sfnt_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 10448 bytes
SHA-256: c033bb540d5e3cc7be1a11c9b343e7cb47c42785a78623d0203f0b51ec556ccc

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