Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc7d28ec2fa33ca…

MALICIOUS

PDF

73.9 KB Created: 2021-01-25 00:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7265c778f42a5c5e700755e3f15a8130 SHA-1: 1baa35fc8b2d88607d0bd92915e83677ae1b6927 SHA-256: 6bc7d28ec2fa33cafbb5898bcdb99f4d9489687c34b7981c899f52aef242dd44
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, specifically for brand-impersonation credential phishing. It contains numerous external URIs and redirects, with a critical finding indicating it impersonates Microsoft to lure users to a phishing page hosted on a Weebly subdomain. The presence of embedded JavaScript, though not directly analyzed for specific actions, further supports the malicious intent of delivering a phishing lure.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gumikixinugud.weebly.com/uploads/1/3/4/8/134864359/zikimibaverege.pdf.
  • 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/123?utm_term=70-486+study+guide+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420431/normal_5fd2270927a82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5ff70bb0e3fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_600c832346a6c.pdfIn PDF document text
    • http://ketorebagibof.22web.org/96141668996.pdfIn PDF document text
    • https://gumikixinugud.weebly.com/uploads/1/3/4/8/134864359/zikimibaverege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fee90d20b5db.pdfIn PDF document text
    • https://zexebofefibem.weebly.com/uploads/1/3/5/3/135303963/5976767.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/dieiapf/que_es_un_analisis_foda_de_una_empresa.pdfIn PDF document text
    • https://cdn.sqhk.co/raxinosi/jibgjmB/bloons_td_battles_6_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dokadajij/wSoihJ8/84164629958.pdfIn PDF document text
    • http://padugozerur.22web.org/79570951595.pdfIn PDF document text
    • https://dexanefuv.weebly.com/uploads/1/3/1/3/131383512/mejovegonafo-luwogamabuwegov-munetuvimegubap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472213/normal_5fd049505bfdb.pdfIn PDF document text
    • http://securityverifiedservices.com/79447072429mtnq0.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/igxyhht/mafia_city_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginokaze.epizy.com/25372839624.pdfIn PDF document text
    • http://rasunafosav.epizy.com/sovisufikinefum.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/mamimizavuwug.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_off0000e246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 5484 bytes
SHA-256: d3f481b7ac5e3b5ae47765d182c509bd14ffb6c202c2cf867da03ab2eec09491
font_01_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 10944 bytes
SHA-256: 709cb8b9d0aea2dfaab35619e36d8ffeb3dee562ec781404a5b9b6d4fe1a5fc4

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