Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2aacc0fb4500d11…

MALICIOUS

PDF

75.1 KB Created: 2021-04-14 22:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d7f108e0b14c921cd21a7572adc21d07 SHA-1: 96adb885737d565d969b482a8759c05786b1cf29 SHA-256: a2aacc0fb4500d11c17e69dc608be4c3747906b74c977999b1c69d86d8fa590e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=toyota+forklift+truck+parts+manual PDF link annotation
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/xozesuvoxefal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fcf381fabf8b.pdfIn PDF document text
    • https://pibofarijefi.weebly.com/uploads/1/3/4/6/134648305/67078c93f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5ffebd84e8b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_602b56b4b617d.pdfIn PDF document text
    • https://wakaxizuso.weebly.com/uploads/1/3/5/3/135322555/leretuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupopagiwagivu.epizy.com/balancing_chemical_equations_gizmo_quizlet.pdfIn PDF document text
    • http://wetusadesaxoni.rf.gd/aceite_esencial_de_mua.pdfIn PDF document text
    • http://potimafekun.epizy.com/73004170332.pdfIn PDF document text
    • http://mapojadesagez.epizy.com/romantismo_no_brasil_poesia.pdfIn PDF document text
    • http://bijalefopate.rf.gd/56021844760.pdfIn PDF document text
    • https://e474413f-ff6d-4b46-a00c-d4c33541206b.filesusr.com/ugd/ddecc0_bd878dfe68864e79933b4ef984a55068.pdf?index=trueIn PDF document text
    • http://piwefijegiv.epizy.com/wordly_wise_book_7_lesson.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_4184b21192bd43e9b3236ac99e758c67.pdf?index=trueIn PDF document text
    • http://nesemuvalumut.rf.gd/kowadikanuzasaxalu.pdfIn PDF document text
    • http://dijutago.rf.gd/escape_room_movie_parents_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5276 bytes
SHA-256: 370d925fb6a032371eecdf8e0e6efecbcf01eb3b7156d89aef088acd935f06c9
font_01_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 10992 bytes
SHA-256: 1382a5e2af8721ae256605f4ac884aea2f0cffb22c5814f9f0aadf5c90de97d2

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