Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7ce36e35adfbfe…

MALICIOUS

PDF

76.5 KB Created: 2021-02-16 06:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b0f67b8db0d3e9976b3247f25d9722c9 SHA-1: 464281b1ca84d6d3eb580156a7144725bcb58bde SHA-256: 3f7ce36e35adfbfee3a79e0e6e1b3fcd9290257a80a19b6ffe6c0155ac34fa23
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=canon+mx432+scanner+setup PDF link annotation
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/29c29.pdfIn PDF document text
    • https://jewepixixa.weebly.com/uploads/1/3/0/8/130814248/38f6637.pdfIn PDF document text
    • http://zitokik.iblogger.org/conundrums_riddles_with_answers.pdfIn PDF document text
    • http://fogimikolasot.iblogger.org/bsc_1st_year_zoology_syllabus_2019.pdfIn PDF document text
    • http://robertferrell.net/automatic_frequency_controllqoae.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/wopasuwojafivinum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494891/normal_6013866025232.pdfIn PDF document text
    • https://wexubowepupewaw.weebly.com/uploads/1/3/1/8/131856394/9219789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nazonuretowu.epizy.com/new_album_song_2019_dj.pdfIn PDF document text
    • http://zunebafovako.epizy.com/psp_emulator_games_for_android_iso.pdfIn PDF document text
    • http://fogiwomagivizu.rf.gd/eclipse_generate_code_coverage_report.pdfIn PDF document text
    • http://mapesag.epizy.com/chhaila_bihari_ka_gana.pdfIn PDF document text
    • http://kakogajoxe.epizy.com/25033918022.pdfIn PDF document text
    • http://xenilesaripesu.epizy.com/bhoot_returns_full_movie_hd_free.pdfIn PDF document text
    • http://lejipuzab.epizy.com/bajaj_pulsar_135_spare_parts_catalogue.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_off0000ee5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5D 5404 bytes
SHA-256: b32d2bec5a79c4f0b6e825d3364da1d180b294cb97e45b0585a0165202c2fa82
font_01_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 10648 bytes
SHA-256: 35ea7aeb150f1f607acf6d9a1e3e416115fd418b975eb96d4ed9a5c1aca43732

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