Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97627bc75b589cb…

MALICIOUS

PDF

71.0 KB Created: 2021-06-08 04:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a7e7549f98f987bb3339897991dd0497 SHA-1: 2129ead0dcae234915e2688304d330efe5cf38c0 SHA-256: d97627bc75b589cb5c26691266d84b21733f9b486948ca7feb5d3ede9317505e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one pointing to 'irlanc.ru', suggesting it's part of a phishing or malware distribution scheme. The PDF's structure and embedded content indicate it's designed to redirect users to external resources, likely to download further malicious payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://irlanc.ru/pbw?utm_term=paper+plane+templates+free PDF link annotation
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/velefelalebito-pidilewi-gigumis-noxoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486035/normal_604a3f0d74056.pdfIn PDF document text
    • https://lodetisider.weebly.com/uploads/1/3/4/7/134732723/26083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5ff273f097641.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/bajeforigigol-wonojofuk-keropogupigeki-dekowix.pdfIn PDF document text
    • https://tukusalo.weebly.com/uploads/1/3/0/9/130969921/9118383.pdfIn PDF document text
    • https://rodonakerunatep.weebly.com/uploads/1/3/0/7/130740524/surogakusabutor_nemigam.pdfIn PDF document text
    • https://demogevofowa.weebly.com/uploads/1/3/4/6/134608938/5398885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_60be25b56a45c.pdfIn PDF document text
    • https://tigubitutonoxib.weebly.com/uploads/1/3/4/4/134476812/169854.pdfIn PDF document text
    • https://boxolajabamofi.weebly.com/uploads/1/3/4/3/134356625/sogimefujib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144428646/foniwuzimuse.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/caucasian_chalk_circle_chapter_summary.pdfIn PDF document text
    • http://torefobomuzu.pbworks.com/w/file/fetch/144804366/how_to_program_dish_hopper_54.0_remote_to_tv.pdfIn PDF document text
    • http://gulisapil.pbworks.com/w/file/fetch/144420750/holley_carburetor_tuning.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413997/can_you_cook_stuffed_chicken_breast_on_the_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676a7a2b-0ead-420c-b72f-32d284170312/learning_arabic_online_free_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c056696-e95e-4d05-9f7f-ec6af5ab347b/resumen_del_libro_la_agonia_de_eros.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144569637/bugawonagixolop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c489ff-2958-43f9-be80-de15578b5dcf/why_attending_conferences_is_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a455d4-5337-4284-9ecc-526dc4cf8ffd/77823312270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92bb36b-dc78-4f2c-9b9f-481ba2724dd2/how_to_prevent_cyberbullying_essay.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144472977/how_to_become_a_jag_lawyer.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_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 5048 bytes
SHA-256: 14a9ee22a9302f2356f1759ed417423e805d349a1a99526da37feae72917ac41
font_01_sfnt_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 10352 bytes
SHA-256: 75c9d7b8ff72ee35414193d09b4a0f3a92db0772ec4ca91f997416d47ab61b11