Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba252fe8a17585b2…

MALICIOUS

PDF

77.3 KB Created: 2021-02-13 20:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 74ccaef0523428ffdc22fa38a1465860 SHA-1: 9c64e8cb7f0672113eb851b00c8101d6c1d33860 SHA-256: ba252fe8a17585b2d1bbf0e37f19c0142311c3fafe63ac61ac393d39245ee58f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jottigo.ru/123?utm_term=olympic+bar+weight+limit PDF link annotation
    • https://cdn.sqhk.co/nulusezitelo/bgfjfgj/bufifukefuxiduk.pdfIn PDF document text
    • https://cdn.sqhk.co/xojapafe/b64kwhk/callaway_gardens_resort_pet_friendly_cabins.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/3379893.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/ihj8gg7/73161690490.pdfIn PDF document text
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/wadetukuxanepibotuxi.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/nibadetujexufe_defufemuke.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/gdjLXpi/wivax.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/063fd01.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/jjfljnQ/pibijuvifewox.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/sesitolepaku.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/ujc5Qib/wuxawufavironebusojododu.pdfIn PDF document text
    • https://kikurexabo.weebly.com/uploads/1/3/5/3/135325422/ladas.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/iaKgfyO/76758058463.pdfIn PDF document text
    • https://gatelixepa.weebly.com/uploads/1/3/1/1/131163507/zululikirusonetu.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/gjf2rhf/dirt_car_race_tracks_in_florida.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://sagovonopa.rf.gd/nisugenedipimovumasumob.pdfIn PDF document text
    • http://joxumokuri.epizy.com/sbi_duplicate_atm_card_application_form_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 5100 bytes
SHA-256: 5debf14db62d5899eddc8d410c7ba448adb48ad186a57221eb8fd1b092ee7484
font_01_sfnt_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 10156 bytes
SHA-256: b0b7631dac3c4b24d820d0d5bdbb98dc268b1a38b7832baae1b5b4ddd0f2b44d
font_02_sfnt_off00011975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11975 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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