Malicious PDF — malware analysis report

Static analysis result for SHA-256 6024464c9353d24e…

MALICIOUS

PDF

69.2 KB Created: 2021-03-21 06:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 06d94294b0ffb7d6aff798417054d7e1 SHA-1: c717c758bcff42dc68516cf4706f391d0b79dede SHA-256: 6024464c9353d24e740334d35de702e6007ac5594b6544449c67028a1f24867c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to 'chemistry pdf answer key' and 'wkhtmltopdf', indicating a deceptive pretext to drive traffic to malicious URLs.

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://pelibifir.ru/wix?keyword=pogil+chemistry+pdf+answer+key PDF link annotation
    • http://buvalopexur.mygamesonline.org/how_to_pair_anker_soundcore_life_p2_true_wireless_earbuds.pdfIn PDF document text
    • http://folejaf.mypressonline.com/65631484411.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/puxadu_lizedaviratoni_nupiduwor_pikan.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/bajuwokago.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/8984948.pdfIn PDF document text
    • http://mscredit.info/how_to_change_my_voicemail_on_iphoneefdrr.pdfIn PDF document text
    • https://cdn.sqhk.co/zokirafuka/gcncheR/bugatti_chiron_wallpaper_hd_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/ijh83gc/wubebolanoforadulobo.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/igijbje/camera_capture_image_android.pdfIn PDF document text
    • http://nawemofukewo.medianewsonline.com/calendario_liga_nos_18_19.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/88202279017.pdfIn PDF document text
    • http://groby-ritual.online/why_is_international_mail_taking_so_longlr10u.pdfIn PDF document text
    • http://creamwalls.space/8th_grade_math_test9sw1z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57272288-8b96-479a-aea4-b4f92e808376/14743955133.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/letra_haz_llover_rey_de_reyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc16aaf7-b70f-42d9-96b8-12488b95315d/76213339641.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_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 5828 bytes
SHA-256: 533d3fa5edfceb267c185bf0b5db55d4ff8b8ad3d598c8a9450c392daa410a28
font_01_sfnt_off0000e3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3ED 10868 bytes
SHA-256: 1d325323fb494f2e20ea20fe9cce56ee301676f957dd05be583be87f90a44bc3

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