Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ddfc0a0da855c6…

MALICIOUS

PDF

73.2 KB Created: 2021-02-15 06:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd78fa90562d09dc7c04a48e920d7823 SHA-1: 6a6174b92ca413f55f4665978c9ad875f709ef79 SHA-256: f6ddfc0a0da855c6b823531c28db65c357fc41e24e80d52078bfffb47eb30a45
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are used to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/aws?utm_term=persona+5+mishima+planetarium+answers PDF link annotation
    • https://sazeduxawi.weebly.com/uploads/1/3/2/6/132695343/6942035.pdfIn PDF document text
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/rujawaxudezum-jinej-tunil-sikanomopi.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/bozilipizox.pdfIn PDF document text
    • https://godebisexizo.weebly.com/uploads/1/3/0/7/130775633/fojuxuku-vuvuzopalov.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/lEZifgi/fire_wallpaper_hd_background_png.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/convert_base64_to_blob_javascript.pdfIn PDF document text
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/8278108.pdfIn PDF document text
    • http://hookup154.fun/zesotenozezobezozesikabuayg2.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/jezotedaku.pdfIn PDF document text
    • http://all-system7.work/nopudoqdz4s.pdfIn PDF document text
    • https://fanesorugetefex.weebly.com/uploads/1/3/1/3/131383934/puwunalu.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/0243dd6c92d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474457/normal_5fffc5971fcaa.pdfIn PDF document text
    • https://tusululobiwivet.weebly.com/uploads/1/3/1/1/131163859/3dedf136bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moxurux.epizy.com/finalisation_of_accounts_steps.pdfIn PDF document text
    • http://lafanibawonol.rf.gd/xajiliwonijopefusuvebaw.pdfIn PDF document text
    • http://loxometos.epizy.com/bafunabegozajeximelep.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_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 5276 bytes
SHA-256: 153b432d5be85c78de6dce46864af6a873a7a250fe95304b16e62bbd7e3fc3a1
font_01_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 10912 bytes
SHA-256: 9eadd993ae39d93e0fba0c1e57c87f471e8a1df472768a51bd17ca42e36a4919

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