Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afd494edc38768e…

MALICIOUS

PDF

78.3 KB Created: 2021-03-04 00:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5dcb0edb2a2682b47ae1dc33fc722e42 SHA-1: 2c94638794538505f40a2bd13186ddcb445e28d7 SHA-256: 4afd494edc38768e2c156ee0cc3d220617c23a2912ca6db850a0cae870651691
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=rese%25C3%25B1a+de+libro+ana+frank PDF link annotation
    • https://cdn.sqhk.co/diratukuz/jcjfjfr/wepidizixurisiv.pdfIn PDF document text
    • http://golosa-spasibo.ru/airline_pilot_uniform_rankmna29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5ff608ce40ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_60265db4a5a2b.pdfIn PDF document text
    • http://ru-dev.xyz/9438301696uniz8.pdfIn PDF document text
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/tasunev_watimiw_jevixonu.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/bejopek_wolorofijowajad_kirazavukubub.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/eihzsQP/sagenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_60192b32452c1.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/3a9cd40502c.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/7682554.pdfIn PDF document text
    • http://canonsburglake.org/acetate_sheets_a1c5fwm.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/fiiw6ij/bovoxegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_6036d0a475f84.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/gjicQ1p/73074527743.pdfIn PDF document text
    • http://kovokowem.iblogger.org/internship_report_sample_computer_science.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezedavepajizum.rf.gd/how_to_replace_element_in_rheem_hot_water_heater.pdfIn PDF document text
    • http://xewaxal.epizy.com/43716005817.pdfIn PDF document text
    • http://sobikunukozi.rf.gd/72669196641.pdfIn PDF document text
    • http://daxevetefixidaj.epizy.com/77470646230.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 5324 bytes
SHA-256: 337b3453d54e6283c1d553cd4590b82419a45a37653c91911ae0f2dfdaf893f6
font_01_sfnt_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 11848 bytes
SHA-256: 84c5e4beed947ec859299c6e1b9ab942811cb513537ba61f5b7cf40afae37b68

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