Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9beb1da5662e1e…

MALICIOUS

PDF

86.0 KB Created: 2021-02-17 23:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f62fcf7c9af427fd5f93675c60544b6 SHA-1: d1b4244b2c32912c7cf2e13de921c4667682d4f1 SHA-256: 8c9beb1da5662e1ec073a55e3ad46c798cddfc73f69c1687ce1a53fa2f08f647
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a significant number pointing to disposable domains, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious 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://bologen.ru/wix?keyword=%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B5%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B8%25D0%25BA%25D0%25B0+5+%25D0%25BA%25D0%25BB%25D0%25B0%25D1%2581%25D1%2581+%25D0%25BC%25D0%25B5%25D1%2580%25D0%25B7%25D0%25BB%25D1%258F%25D0%25BA PDF link annotation
    • http://dojaligiwojop.22web.org/jelopofenolorelosulagi.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/NgejWjc/sakura_school_simulator_apk_mod_versi_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/fN1NiaH/lusebobitonurifativisatis.pdfIn PDF document text
    • http://tameeniraq.com/kadevurodirafudejjyova.pdfIn PDF document text
    • http://yesnutural.space/risk_assessment_template_for_software_developmentcuj1u.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/VaGjgfz/6972013666.pdfIn PDF document text
    • http://reetodo.online/bajaj_induction_cooker_icx_7_user_manualkj0i4.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/jxoq9Nb/gewategefumirufuxe.pdfIn PDF document text
    • http://good-production17.site/nanodidekovatatusemuta1nz.pdfIn PDF document text
    • http://meetsoda.club/achha_ji_main_haari_song_pagalworld5ypqh.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/vemaxobeziserodozak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nazewomufewe.rf.gd/the_stand_2020_where_to_watch_in_canada.pdfIn PDF document text
    • http://rimugerumu.rf.gd/tum_bin_laden_movie.pdfIn PDF document text
    • http://wafogaz.rf.gd/wimavomamajagagudajugisuj.pdfIn PDF document text
    • http://vunibem.epizy.com/aplikasi_video_instagram_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/natakam_movie_telugu_free.pdfIn PDF document text
    • http://xonekumoti.rf.gd/cambridge_dictionary_free_full_version.pdfIn PDF document text
    • http://tejademadubo.rf.gd/anganwadi_form_2019_west_bengal.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/15673441945.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 5520 bytes
SHA-256: ee1b71dc0860f3cad659ada0ebdd5a0be7394035c82c4812a7bfebc033f0daef
font_02_sfnt_off0001060d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 14364 bytes
SHA-256: 3f78569441c23af1f7c7b039cd630f3b0031af1c0a7576147ff5243dfe3a9cf4
font_03_sfnt_off00013293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13293 16148 bytes
SHA-256: 333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd