Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88e059ec9149452…

MALICIOUS

PDF

80.4 KB Created: 2021-02-26 03:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 10f3db95c315f54e3e465b8088edfd3f SHA-1: ab95f41dd5ac520700eca9804e53d7bc3e357051 SHA-256: c88e059ec9149452148d82beb7e0b6d28b72384a64ed0a8adfdcabbbab4ff056
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable domains and redirectors, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=what+does+it+mean+when+you+dream+about+a+friend+crying In PDF document text
    • http://mikovil.mywebcommunity.org/los_censores_luisa_valenzuela.pdfIn PDF document text
    • http://lg-supportteam.com/movezefifokbqlt.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/2290465.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/9908748.pdfIn PDF document text
    • https://sojenakituvewo.weebly.com/uploads/1/3/3/9/133986345/fepukola.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/445360.pdfIn PDF document text
    • https://kixumiziri.weebly.com/uploads/1/3/2/6/132681985/mepisemumegepegofir.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/779340758718fvd7.pdfIn PDF document text
    • http://momsmall.space/free_music_maker_softwaresvryca.pdfIn PDF document text
    • http://alcexpress1.xyz/gelimigidexili30oby.pdfIn PDF document text
    • https://vuxarujetununo.weebly.com/uploads/1/3/4/4/134437765/5e00f6.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/nawuzotowinidudixofas.pdfIn PDF document text
    • http://argo-tourism.com/spring_framework_version_upgrade6uodn.pdfIn PDF document text
    • http://nat-fru.space/vepizizipawikscapw.pdfIn PDF document text
    • http://delinapod.mypressonline.com/how_many_books_are_in_the_wings_of_fire_series_in_order.pdfIn PDF document text
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/5325079.pdfIn PDF document text
    • https://rovoduwomu.weebly.com/uploads/1/3/5/3/135332400/4806054.pdfIn PDF document text
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/8282ae174af2dd.pdfIn PDF document text
    • http://blue-tick-central.com/nowhere_man_movie_2005cowir.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/4432843.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 5632 bytes
SHA-256: d4d81b29f84f44ee7d1e958ac0dd4ebcf41efaf18357b93a62ca8e1d699b20ad
font_01_sfnt_off00010353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 10012 bytes
SHA-256: a1bb9091496b43fe4e5dd818493848ecafd3721db3661298441f94bad1fc3df2
font_02_sfnt_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f