Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f5911d6c12b15b…

MALICIOUS

PDF

110.0 KB Created: 2021-03-25 12:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ff92747782689df90c2f3350397b82a9 SHA-1: 20a231c6e3681de0c53d2c3e12444872cb254f73 SHA-256: 60f5911d6c12b15b3aa18b08bf42a1e675af8eb44fe1f32af6f114763a8946d7
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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://jacksth.ru/strik?utm_term=manual+de+calidad+de+un+restaurante+ejemplo PDF link annotation
    • http://tevfikyuce.xyz/zogilutibawixunudiperrzf6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_5ffe41495b603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_603f5bcd53135.pdfIn PDF document text
    • http://poguzozod.sportsontheweb.net/sasarivukujujebeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_6050fb4889bcb.pdfIn PDF document text
    • http://marketitaly.pro/how_long_do_you_cook_a_10_pound_turkey_in_a_roastermr3ug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_60217df443a9e.pdfIn PDF document text
    • http://govitus.sportsontheweb.net/adverbios_de_frecuencia_en_ingles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_600ea3d72850a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_5fda72651317c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_601714484b50c.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/dog_man_books_2020.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/propresenter_5_mac_full_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476783/normal_600479c9b2cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_605a231264a41.pdfIn PDF document text
    • http://feelslike35.com/zakemivanononexavmhb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450336/normal_60122675a6a86.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/antennas_and_wave_propagation_fourth_edition.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/sipowapudeduduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_602c6aebca036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463812/normal_5fe31edf2a75b.pdfIn PDF document text
    • http://operationhomeplate.com/graco_glider_lx_weight_limitzx04s.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakagigoneliv.myartsonline.com/sholawat_burdah_teks_arab.pdfIn PDF document text
    • http://levapoloj.onlinewebshop.net/bivariate_binomial_distribution.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/12114655760.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/vunijawozutiwiva.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001593f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1593F 1764 bytes
SHA-256: 52417a4dea6cf4c23915f2d0aa3d6eb080cb5ff5b803c9ac7fe692bc9eaff1f5
font_01_sfnt_off000161f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161F9 5300 bytes
SHA-256: c4dc6598e0a4dec29a6a9df9f017508b8351264a015917dcd377e9a53c2a831f
font_02_sfnt_off000173f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F0 2376 bytes
SHA-256: 5c40e7f474e386e20dca8ceaff183fe3ae7338eb51ccf9197708063aa16f6d81
font_03_sfnt_off00017ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EA1 13188 bytes
SHA-256: 1bbc7eca77fd7aaa34aae8ccd42bcd68b2f90c9dcdf40c6257437e4a0e075b67