Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a80608a14f079e…

MALICIOUS

PDF

75.1 KB Created: 2021-04-04 23:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 44dc018aa2a761b4275602be8914ccc2 SHA-1: d9b356d5e0caf1197149204f53592d2c1c723854 SHA-256: 81a80608a14f079e2b67bf94baea0e3d6797cd6d5cce2e73f80685af2e42740a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=how+to+estimate+how+much+it+will+cost+to+build+a+house PDF link annotation
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/1015746.pdfIn PDF document text
    • https://tuwuribo.weebly.com/uploads/1/3/6/0/136027226/birabilesopez-jomufewaj-rukumip-wexovawu.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/solenoid_valve.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/ewNt9rC/super_smash_flash_2_all_star_mode.pdfIn PDF document text
    • http://zarudofafibitov.mywebcommunity.org/graphic_organizer_web.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ajaZgh7/84943259698.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/i0jggcE/movie_maker_export_to_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/jgj9gd2/android_emulator_bluetooth_enable.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/r0c5hhi/i_am_ping_pong_king_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tozerutiwezu/GBhcid2/85434107693.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/hWIQjhP/command_form_spanish_tu.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/vjiQfjd/miraculous_ladybug_running_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/ijjcjav/69143240249.pdfIn PDF document text
    • http://xasowokudat.medianewsonline.com/6589225712.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/jirufekusad.pdfIn PDF document text
    • http://bagezokazuraw.medianewsonline.com/berliner_platz_2_neu.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/lenovo_g50-45_drivers_win7_32bit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesetunal.onlinewebshop.net/nipurewekusogobe.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/11785049571.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_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 5276 bytes
SHA-256: 9b0d17c5c3f1a9b021d634fe0a488bd7070fef63f988be407072ce661fc38f5f
font_01_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 11412 bytes
SHA-256: 79256685586c6ed356262c6fb383f8f70368f2836e8c57e5836f9cfe009e5ada

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