Malicious PDF — malware analysis report

Static analysis result for SHA-256 15daa4936bd69629…

MALICIOUS

PDF

69.3 KB Created: 2021-02-09 21:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5a5ff2deae021800a799f6aa5ff15cef SHA-1: 3bd2d394acacdbc5e4227feadeb90762d2a16b91 SHA-256: 15daa4936bd696298125249eedbdecfa82f9f579e48849712ded9c8626e3bff4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, including 'https://maypoin.ru/aws?utm_term=free+funeral+program+template+uk', which is likely a lure. The PDF structure suggests it's designed to redirect users to a network of other PDF files hosted on disposable domains, indicating a phishing or malware distribution scheme.

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://maypoin.ru/aws?utm_term=free+funeral+program+template+uk PDF link annotation
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/seroguvomu.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hbgcW6N/motarutiduxajo.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/kuzip-xekara-monas-guwen.pdfIn PDF document text
    • https://diniporugixufov.weebly.com/uploads/1/3/1/8/131856235/c95762.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/hCjYhex/32537158427.pdfIn PDF document text
    • https://wibosopepizasu.weebly.com/uploads/1/3/4/3/134332643/adcf070c4.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/djahiib/online_life_simulation_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/pabulibig/PIjhcjh/final_freeway_2r_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gobikazifelo/ZtF7Iqp/all_secret_codes_for_rocket_league.pdfIn PDF document text
    • https://gavofazipog.weebly.com/uploads/1/3/3/9/133999173/wajedosumivilapajaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60150d153356d.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/fhgBLjc/poxojokajekozope.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/7530459.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/ha1NifC/class_10_maths_solutions_chapter_5._3.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/7c9dc789e60.pdfIn PDF document text
    • https://widajuzuno.weebly.com/uploads/1/3/1/6/131637349/2598204.pdfIn PDF document text
    • https://munuliwakubife.weebly.com/uploads/1/3/1/6/131637312/3652534.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD451 5064 bytes
SHA-256: 2d35c3c870678c46544d4887c10595d176df150d7f9cc3a69db81ee900bf5cdc
font_01_sfnt_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 10224 bytes
SHA-256: 5645e6680cfcf557c2c4e648fc841e5d5aa0a24622483aa5d0b9668c701670da

Open this report in the interactive analyzer, or submit your own file for analysis.