Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8fa8f336965fc3…

MALICIOUS

PDF

81.0 KB Created: 2021-05-09 16:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b645348ab89e25ef4731dcf82487a15d SHA-1: 4c980f099cd1932cb5350e1fb90255380812898e SHA-256: 1e8fa8f336965fc301fb294926a60c0e53c16f030c0f53d24d1ee5dfd43e9f21
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to 'jottigo.ru'. This domain is associated with a link farm and disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+to+reset+ultrastat+thermostat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480891/normal_6015c850c7eae.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/modowej_lovami_sumaw_gakojetolij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471236/normal_60145cca233f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_605a3d395729a.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://lotsmen.com/gazinuzifajabarusafux16dz7.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/697ca4ab7cbc1a.pdfIn PDF document text
    • http://stylecurtains.com/63082225467u0hg5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402960/normal_6006000bd50f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fdc0b47def9d.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/7308782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420760/normal_60005edaed6b1.pdfIn PDF document text
    • http://urro-hu.com/vevajajuxafikoongrt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fdfcdf511c2a.pdfIn PDF document text
    • http://redit.fun/79934321492uhmjk.pdfIn PDF document text
    • http://deemonatrafik.xyz/78623792706n2thn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5ffc9e642c4e7.pdfIn PDF document text
    • http://wownatural.fun/child_care_near_me_open2x1u6.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/a3896cf7-a320-4a35-8223-94e3aa0cdd2e/how_to_set_the_time_on_my_citizen_skyhawk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ca86d9-cf00-443a-ac3a-f1795750e6dc/25585593766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660f1768-3af3-4765-8082-c0facaa85a7e/mackie_1402_vlz_pro_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03da5e91-6ba6-40f4-8885-7959336180bc/signs_of_bad_fuel_injection_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f322ad-ce99-4d43-86e0-451901416171/my_favourite_pet_dog_essay_for_class_3.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_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 4976 bytes
SHA-256: e354e5bec4609edf69ce7c7b7278738efaf91249246b50d0a01332628353e328
font_01_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 11264 bytes
SHA-256: b5a8b6325c4338fcc6b556a3a17e46223b4c5996cfd4297694e007a27b18f557

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