Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb965e2c78d0d1a…

MALICIOUS

PDF

80.1 KB Created: 2021-03-30 10:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 42e0c6921de838a2222672a79fc5c268 SHA-1: 55d77a1582478e672128c00877791039ba3ef982 SHA-256: cdb965e2c78d0d1ac81f1cf3613e78224f00b19f8800e19a33ed030b1def8bdc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=how+to+tell+how+old+a+whirlpool+refrigerator+is PDF link annotation
    • http://copyright-help-report.com/79359981200adijv.pdfIn PDF document text
    • https://suluxeposinugu.weebly.com/uploads/1/3/4/6/134634013/zigowa.pdfIn PDF document text
    • http://istlan.fun/roditudexmzge.pdfIn PDF document text
    • http://amsidisi.xyz/3850159409395b6s.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/1110ca69130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475000/normal_5ffc372059f17.pdfIn PDF document text
    • https://xitetufiwirisax.weebly.com/uploads/1/3/4/0/134041449/selanoso_kigikos_furipevane_buzunugeru.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/vebanofitutefo.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/asphalt_8_airborne_100_save_file_androidl1iyj.pdfIn PDF document text
    • http://wide-do.top/lubexepigoru50t1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_60499413aad5d.pdfIn PDF document text
    • http://betmoy56.com/polaroid_instant_memories_software_is048wax7r.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/selolotogeroro-kizulores-nixutodavuvis.pdfIn PDF document text
    • http://lifegirls.site/nemexuzuzirgbx7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_6047ca940b2ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetuselosuw.rf.gd/que_es_la_altura_uterina.pdfIn PDF document text
    • http://tuvatopuvonu.epizy.com/6627448060.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/how_to_use_a_nordictrack_treadmill_without_ifit.pdfIn PDF document text
    • http://gugogedufos.epizy.com/balarama_2020_download.pdfIn PDF document text
    • http://wuxuxumeso.rf.gd/atmananda_krishna_menon_atmadarshan.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/najosanotoro.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_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 5356 bytes
SHA-256: 4951d04d509b256d9739ee0bc7a299e1a3b83dc3c63523b78302c70e5c4ced11
font_01_sfnt_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 10920 bytes
SHA-256: dd0fb6ea68ebcfac02cc0acbf4867162136653ca1b01e4b26a551cad17a96b91

Open this report in the interactive analyzer, or submit your own file for analysis.