Malicious PDF — malware analysis report

Static analysis result for SHA-256 4461a17945d48048…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 03:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 57132cbbf23d16f6af455cba84dbf58b SHA-1: 96c4c21327fb44d9a8af11dc5cbcb74dbd3d5fd4 SHA-256: 4461a17945d480489b2fab8e86d8b6bc71e3e225c41c16a03e958e94b725ba31
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically linked to a search query for 'cpm algebra 1 chapter 1 answers'. This suggests a phishing or malware distribution attempt, leveraging seemingly legitimate search result content to trick users. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://xezojetit.ru/wix?keyword=cpm+algebra+1+chapter+1+answers PDF link annotation
    • https://cdn.sqhk.co/xufojidaju/5ifAGhc/carrom_3d_free.pdfIn PDF document text
    • https://rixemovupel.weebly.com/uploads/1/3/1/6/131606965/4104550.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/590629.pdfIn PDF document text
    • http://jafixane.iblogger.org/75947238729.pdfIn PDF document text
    • https://pemolodubi.weebly.com/uploads/1/3/6/0/136052155/1354023.pdfIn PDF document text
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/266119.pdfIn PDF document text
    • http://xejeboge.22web.org/definition_of_blue_ocean_strategy.pdfIn PDF document text
    • https://vonosupaxeme.weebly.com/uploads/1/3/0/7/130740497/5637918.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/9061277.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/chgY0qw/zonedubasimipitevezel.pdfIn PDF document text
    • https://mujeganivavubu.weebly.com/uploads/1/3/1/4/131406781/wosatutodupowu-jagadiv-piginadovoz-rugipa.pdfIn PDF document text
    • http://jujiwaneko.iblogger.org/pesusopavasipavesuze.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/jpiiRjf/cosmic_meaning_in_bengali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuxalono.epizy.com/tutorialspoint_android_full_version.pdfIn PDF document text
    • http://likijanima.epizy.com/39869534755.pdfIn PDF document text
    • http://xazoviwupudowol.rf.gd/amenorrea_primaria_y_secundaria_2020.pdfIn PDF document text
    • http://pimibini.epizy.com/batman_the_killing_joke_comic.pdfIn PDF document text
    • http://gewekerob.epizy.com/rudepelidewewas.pdfIn PDF document text
    • http://wugepigen.epizy.com/82769912398.pdfIn PDF document text
    • http://bujepefu.epizy.com/is_free_sat_good.pdfIn PDF document text
    • http://minegavanifur.rf.gd/banco_itau_argentina_annual_report_2018.pdfIn PDF document text
    • http://kufelinal.rf.gd/download_java_8_for_mac_os_sierra.pdfIn PDF document text
    • http://bogasupi.rf.gd/marvel_strike_force_apk_mod_ios.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 5536 bytes
SHA-256: 049be41dd0c604c2f8976e03c201641318a77216050fbb562157bfb9ede22614
font_01_sfnt_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 11792 bytes
SHA-256: ab637ba84d72385e0b7041a4cabc1bbc535498063c60d33c8a02e2545f720c46

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