Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2c7ae6afa42aba…

MALICIOUS

PDF

70.9 KB Created: 2021-06-01 16:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bec6177b98217f7e9aefb5d2f1c525b2 SHA-1: 4b43b856b1feebab5dc88e52309ccbe83079fad2 SHA-256: da2c7ae6afa42aba3f60bfc749468840853455bcfd2609eb02cda1f5e6df6b34
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of redirects. While no scripts were explicitly extracted, the presence of many external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

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://catamma.ru/pbw?utm_term=free+colouring+sheets+of+cats PDF link annotation
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/8002521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_6027ace8b50a7.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/4141824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fd1f47c91345.pdfIn PDF document text
    • https://ruweveti.weebly.com/uploads/1/3/1/3/131379789/towurixawilajeveju.pdfIn PDF document text
    • https://nagilozumovamag.weebly.com/uploads/1/3/4/3/134317868/zopukibafasiw.pdfIn PDF document text
    • https://vakejijumusefuv.weebly.com/uploads/1/3/5/3/135313512/lajom.pdfIn PDF document text
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/191894b0e087a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470967/normal_5fde909717563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5ffa57a88ba10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_604888de8ad8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a02ce6-7337-486c-bbaf-58c690257b90/what_is_an_ellipse_in_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7eb122-c4b8-4350-9e00-96ce3513b079/33283025228.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144426783/english_grammar_test_paper.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144455214/punirarebuxevuvaloneti.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144414954/nibopoletupojudola.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144441780/dog_rescue_near_me_puppies.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144463980/loxiwunupaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0eb6d1-4007-41bb-82f0-da0c015b86a6/christmas_carol_jim_carrey_movie_online.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/11912868328.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/silent_night_easy_piano_sheet_music_with_letters.pdfIn PDF document text
    • http://barumena.pbworks.com/f/what_is_the_order_of_star_wars_books.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_off0000d946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 5100 bytes
SHA-256: 3eccd75d80fcd708ac947add3b656f757b8af99c80177b54d71be4eac647543e
font_01_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 10352 bytes
SHA-256: 57668f900d3b4fca9d719aeb3382fd6f37e50fb93a7e11d73b28a010eb60ca92

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