Malicious PDF — malware analysis report

Static analysis result for SHA-256 309a297a77e39162…

MALICIOUS

PDF

76.7 KB Created: 2021-02-21 14:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 62efdc6269b1c3c6d1c3b1718f3b6827 SHA-1: 95249d31a45924a4f93f78d83e48480a0eacdd6b SHA-256: 309a297a77e39162098befd1e6256aec1c6b90d4a3af9972e261fd8c59be3685
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure disguised as an educational guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=essential+guide+to+becoming+a+master+student PDF link annotation
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/651348.pdfIn PDF document text
    • http://com-signto5.xyz/nibozumamepowatatasoy8jm0.pdfIn PDF document text
    • http://ipoteka.net/9700400345mpjz.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/l4whijU/fifa_world_cup_2022_qualifiers_africa_groups.pdfIn PDF document text
    • http://golivexi.22web.org/abraham_and_isaac_worksheet.pdfIn PDF document text
    • http://azorocheat6.xyz/what_is_the_best_alarm_system_for_a_cargz3h4.pdfIn PDF document text
    • http://bitasifo.22web.org/76466711161.pdfIn PDF document text
    • http://pearhaidhr.fun/adventist_church_logo_freem5fmc.pdfIn PDF document text
    • https://fifekususelamib.weebly.com/uploads/1/3/5/3/135349053/xedelikixefupi.pdfIn PDF document text
    • https://povaxabo.weebly.com/uploads/1/3/5/9/135976235/vanekosixiboj-bevigopin-mezefebado-lelolikurax.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/6947763.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/2045203.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/cgjKjex/signal_private_messenger_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kelufuro/jdih6hh/jetpack_joyride_online_hacked.pdfIn PDF document text
    • http://50offit.pro/bodoniponim6wxxx.pdfIn PDF document text
    • http://wownatural.fun/6909621872ojw8z.pdfIn PDF document text
    • http://ighelpcenter.xyz/jibuduloxalejogopikbmkf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palezonipegodaf.epizy.com/73248850088.pdfIn PDF document text
    • http://kekabifaku.rf.gd/hammerwatch_ps4_trophy_guide.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_off0000e496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 5356 bytes
SHA-256: bf9037466e55a15d4c1ae6715b3e59d88891324155dda3f7423b8c329ede62d6
font_01_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 14928 bytes
SHA-256: 1a2cef3d4ef519adc62f7bd7b9032c8973d79c1a21d8a09c15a067949e01ed57

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