Malicious PDF — malware analysis report

Static analysis result for SHA-256 70de91f968eb3ef0…

MALICIOUS

PDF

84.8 KB Created: 2021-05-13 06:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9c1ad8d4acf5727ac483a7c3dae5f5a3 SHA-1: cb196a2c9455e8278c96df5a314c45a670d954fc SHA-256: 70de91f968eb3ef0f6339712128b6ee923bfa3a56c951315ea2b27cccaf42674
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 numerous external links, many of which point to disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://soxebez.ru/strik?utm_term=high+school+musical+script+pdf', is designed to lure users by appearing as a search result. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate a malicious intent to redirect users to potentially harmful content.

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://soxebez.ru/strik?utm_term=high+school+musical+script+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416811/normal_606e7c89215f7.pdfIn PDF document text
    • https://denoxexulove.weebly.com/uploads/1/3/4/4/134457588/revowebulevipu_rujixetur_salewixomowe_velezonokubi.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesavif/Nkghjdt/mosare.pdfIn PDF document text
    • https://danisamotaroz.weebly.com/uploads/1/3/1/6/131606121/8b543fcb6b.pdfIn PDF document text
    • https://cdn.sqhk.co/duwutawuna/hhjjegg/human_fall_flat_online_multiplayer.pdfIn PDF document text
    • https://valexipeval.weebly.com/uploads/1/3/0/7/130775413/sisusamusetuso.pdfIn PDF document text
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/goxijixafiboba_xetomisefesa_temenaxedo.pdfIn PDF document text
    • https://cdn.sqhk.co/zalogifewoje/jbbexUe/amazon_alexa_echo_plus_2nd_generation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5fd0f491ba0ed.pdfIn PDF document text
    • https://rofasotukez.weebly.com/uploads/1/3/0/7/130740205/mazirepugikeson.pdfIn PDF document text
    • https://viwejabaru.weebly.com/uploads/1/3/4/7/134749074/d68009c.pdfIn PDF document text
    • http://koreatop.ru/dafidox27ubu.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/dqidFpX/timak.pdfIn PDF document text
    • http://lenudes.com/15730928770od2ru.pdfIn PDF document text
    • https://nugekiva.weebly.com/uploads/1/3/5/3/135322430/cccb5f11229439.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/bmw_320i_2008_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/how_old_is_link_in_ocarina_of_time.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_off00010cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC9 5528 bytes
SHA-256: 3a3df1c304de49a787c3a74376e7f174455750bc74059a4520feae013842f48c
font_01_sfnt_off00011f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F72 11392 bytes
SHA-256: f08619a1ed4c598c05a0018469626195edb622683195af4d8955824bd0227026

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