Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b24962a21839e5…

MALICIOUS

PDF

75.7 KB Created: 2021-03-20 14:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b75a4728f6c87b769a6874bcca576d35 SHA-1: 0f84659fe56db0ec244978e2a72f005cb1a5d5ea SHA-256: 79b24962a21839e538f3b0480ef1d2ddf6dce019a27b4953a98ba36422ccb9cb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to search terms, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://vilenefex.ru/wix?keyword=chevy+4+speed+manual+transmission+fluid PDF link annotation
    • https://cdn.sqhk.co/tukawezezo/Blcgdjg/dinosaur_cardigan_knitting_pattern.pdfIn PDF document text
    • http://doucheapp.xyz/16458074651aq35b.pdfIn PDF document text
    • http://copyrightshelpcenter.com/how_to_cite_an_apa_research_paper0c9v2.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/ha64jcp/zombie_street_fighter_game_download_apk.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/english_literacy_test.pdfIn PDF document text
    • http://scoretdho.best/729969630387b60n.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/GmRCijr/pimubedelujatosenurovimet.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/hOeXgdk/vatoligijejavepobuw.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/kalubigizewodawodas.pdfIn PDF document text
    • http://gagipelujer.iblogger.org/23892413339.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/WsIjbwr/marshmello_best_songs_list.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/70693759394.pdfIn PDF document text
    • http://nemafivuduwidob.iblogger.org/electrical_engineering_textbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nijozemujag.epizy.com/vojigakidofepo.pdfIn PDF document text
    • http://baroputufusu.rf.gd/74879965072.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/despedida_carta_formal_catal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706ae4de-c42c-41a5-bb86-961a32ea0611/69687621030.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/special_needs_comments_for_report_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/syllabus_of_class_12_physics_pseb_2020-21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98965ce4-312e-4837-8f5f-01862fa3e077/playboy_ringtone_mp3_download_tamil.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/the_black_prince_full_movie_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11394a4c-7f09-4abb-8f63-97146781a2b8/49308059313.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/sukododarurad.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/ferrari_458_spider_steering_wheel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf6f9e6-5bd9-49e1-bc40-635c6ee9aa7f/75929287409.pdfIn PDF document text
    • http://wafazitowem.rf.gd/11898320607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d6546b-3e52-4906-9865-275d0d6daff0/54739108436.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_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5436 bytes
SHA-256: c47b94095d9811d4926efa5a6d74eab8cb81360377fc887b30f80e384da1228f
font_01_sfnt_off0000f944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 11368 bytes
SHA-256: d704b81d058e9203a4f7482e17e26806937090798e0928dcc18740b820c294c6