Malicious PDF — malware analysis report

Static analysis result for SHA-256 d573d7d9e05687b7…

MALICIOUS

PDF

71.8 KB Created: 2021-03-11 18:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7fa81f2adbee29612dc61514c9412c4 SHA-1: 7dded90f71c2f61791ef9c9c768c51c9a3fcc6bf SHA-256: d573d7d9e05687b78c8614b8a6df1c8f7517f5ec2a398955a9300d4870b9fdc0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a link farm for malicious purposes.

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://dafemum.ru/123?utm_term=amma+private+songs++naa+songs
    • http://pubguckazan.com/where_she_went_release_date_movief50ai.pdf
    • http://mkr-olimp.info/phrasal_verbs_exercises_for_class_126h3ln.pdf
    • http://rerulekoba.66ghz.com/blue_label_telecoms_annual_report_2019.pdf
    • https://cdn.sqhk.co/pufojoloz/Mgihbid/20143596393.pdf
    • http://weinmvc.net/foresajasokimab2u6f.pdf
    • http://meetly.space/manual_da_mesa_de_som_yamaha_mg16xuzf8n3.pdf
    • http://powerhdniy.space/65633077264v67l9.pdf
    • http://trokot-shopnew.online/77909032644rrlph.pdf
    • http://tehnotop.store/water_borne_parasitic_diseases4jjrf.pdf
    • http://usersdeviceprotectionservice.site/andhra_pradesh_government_schemes_listrjkc1.pdf
    • http://bestpriceforukraine.xyz/26632091166tfbtg.pdf
    • https://cdn.sqhk.co/nakizenonetu/KjaWWgj/nazesijomikowisugalidid.pdf
    • http://boludibaderujir.22web.org/sigalujukob.pdf
    • https://cdn.sqhk.co/luwesefizi/jjenZZJ/87108066656.pdf
    • http://xujosigij.iblogger.org/63322154976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_5a7af7e5968f429fb6e23a15e5e89b68.pdf?index=true
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_bed53247ebc54cecb3234f5eb03e37ba.pdf?index=true
    • http://magelul.epizy.com/bowflex_treadclimber_2015_models.pdf
    • http://mugekalamiwatek.epizy.com/kovubufulizabop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad3.bin
44f99cec9b582b2ed7a500d62e942296633ecfc8fabd6267a817df9a79e6f922		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 5156 bytes
font_01_sfnt_off0000ec4b.bin
6578182f0eab56ed35a00eb6c7133479b3fef2c0815e277a724146a80fcbd31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 11152 bytes

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