Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa31c015b9b36bd…

MALICIOUS

PDF

78.9 KB Created: 2021-04-08 16:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4095f70a105613ef9b98282f2e1dfd64 SHA-1: 55d85403b1afa8f429d4b581edd2591f99c8ecb1 SHA-256: eaa31c015b9b36bd8454e992a553d9fbb536ca9a97ac43450ae99b85342be06d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xajibur.ru/strik?utm_term=world+war+z+crossplay+ps4+pc PDF link annotation
    • https://cdn.sqhk.co/lisakopew/CXUhvge/freeze_drying_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/qgjheig/vivokejigakujebunodixokaz.pdfIn PDF document text
    • https://sezariserafuf.weebly.com/uploads/1/3/4/6/134673330/426653.pdfIn PDF document text
    • https://bemagage.weebly.com/uploads/1/3/4/5/134525224/5023773.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/ripimojozifi.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/gavagorapu.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/CVibifW/slither._io_mod_menu_android_apk.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/1931646.pdfIn PDF document text
    • https://nixawajumumija.weebly.com/uploads/1/3/4/3/134338940/xowekofil-vapiduguk-wetolakuzige-dasaxokix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fc6cdece35db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_6064c6bc92431.pdfIn PDF document text
    • https://ribebofav.weebly.com/uploads/1/3/2/6/132681502/gibud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447497/normal_5ffad1cec1d52.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/Ujdn3gf/kupifuwiza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449783/normal_5fe23056a09a4.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/I9hfIic/android_radio_launcher_andern.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_7e1038aec0154186bb9a131feaa89e41.pdf?index=trueIn PDF document text
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_b119d8b7ff514621b87b166ad62a77aa.pdf?index=trueIn PDF document text
    • http://dulaxidej.epizy.com/saazish_film_song.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_df177c70e1044f9c80ed710d25bffa06.pdf?index=trueIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_6e7c270e464c4849b631378109bae9f1.pdf?index=trueIn PDF document text
    • http://rumejumobu.epizy.com/68564022581.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_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 5412 bytes
SHA-256: 17d98441e5dd4d9d17917f56f133ad7e0cb1e43737bfee48b76acb6e9bee6407
font_01_sfnt_off00010af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 10312 bytes
SHA-256: 7652062d0f1aea07fdcdf9e27213482f0f5c733990a73f4398c3fb0892daeb9f