Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd908f4973f6d44…

MALICIOUS

PDF

84.1 KB Created: 2021-03-21 12:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e78939ce60f6e0c38e234dbb48741507 SHA-1: 89027ded3bdabbfcc3966e6a72def9e5bda2310d SHA-256: dcd908f4973f6d4431113005f310a5c53fe4f17b623208962180a7c4e691b80c
126 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous external links, including one to 'kuzutuzo.ru', likely serving as a lure to a malicious site. The document's structure and embedded links suggest it's designed to redirect users to potentially harmful content, possibly exploiting the user's interest in 'interior designing schools in Canada'. No scripts were extracted, but the PDF's nature points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://kuzutuzo.ru/strik?utm_term=interior+designing+schools+in+canada PDF link annotation
    • https://zobanegasub.weebly.com/uploads/1/3/1/1/131164549/5397115.pdfIn PDF document text
    • https://zozovuxogufeduw.weebly.com/uploads/1/3/4/7/134766710/d6562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_602e7fa6c6222.pdfIn PDF document text
    • http://meetraisins.club/what_is_stasis_theory_in_rhetoricf0b9l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5ff1cef0000b5.pdfIn PDF document text
    • http://songkfrk.site/how_do_i_find_my_samsung_tv_pairing_codemdpn7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_6025894316d74.pdfIn PDF document text
    • http://vknart.xyz/zutisalokobikukj3fy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_6040a4663410e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369174/normal_6007ac1e5be25.pdfIn PDF document text
    • http://fuckfrsky.com/77161022164zmykl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_604b4c50a43b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_603d5411d8368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_9f72600e9e2e41f49e436cd4afd39e9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widetunipet/posef.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/83794805891.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/alpine_iva-_w505_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/hip_exercises_arthritis_uk.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_67f3b416786b4f55acae9998e13ca1a3.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_62c81da168d94ef4809cf9edc8e8d35f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/b._c._a_ka_full_form.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_off00010bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCC 5140 bytes
SHA-256: 42cb57713be4d45d3f9424bb9d0abe8acfe28d5aaddc7481329569916979abfa
font_01_sfnt_off00011d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3E 11092 bytes
SHA-256: f7092cf06532fa1fb08aa64e24f41d1f205e79456163e243e3cb173b0b34d288

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