Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f3e1f0426e86fa…

MALICIOUS

PDF

88.0 KB Created: 2021-02-26 12:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a65f1b859980f30851c5b8b0526fc3f9 SHA-1: 26e39c89b743eac163805e4acd80338e6952d04f SHA-256: 12f3e1f0426e86fadc298a2543900869bad79f4236384fcf1860d2a3662eae32
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the structure and URL patterns suggest the document is designed to redirect users to malicious content.

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://maypoin.ru/wix?keyword=cable+one+gulfport+ms+tv+guide PDF link annotation
    • http://difijeso.iblogger.org/sheet_metal_forming_book.pdfIn PDF document text
    • https://virikewujolitof.weebly.com/uploads/1/3/2/7/132712461/846814.pdfIn PDF document text
    • https://sarajifig.weebly.com/uploads/1/3/2/7/132710715/a662e1a602e9ba6.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/DS9Lhj0/bunny_boots_fairbanks_ak.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/7iftHTm/red_roses_lil_skies_lyrics_traduction.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/nusikutetuw.pdfIn PDF document text
    • http://copyrighthelpptteam.com/33354340664zo6rh.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/xgdLtQ8/2020.pdfIn PDF document text
    • http://pibofari.22web.org/xenen.pdfIn PDF document text
    • http://sokolov.fun/non_disclosure_agreement_template_philippinesoyn42.pdfIn PDF document text
    • http://requiredjokblog.com/zorba_the_greek_song_dancemxnt1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudoxaw.epizy.com/wumivupax.pdfIn PDF document text
    • http://fonaxipovun.epizy.com/somiwogifudeg.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/all_chainsmokers_songs_pagalworld.pdfIn PDF document text
    • http://vapovalexuma.epizy.com/baby_songs_in_telugu_free.pdfIn PDF document text
    • http://nejegidijikoj.epizy.com/patriots_edelman_injury_report.pdfIn PDF document text
    • http://wifobujaxude.epizy.com/hanna_instruments_safety_data_sheets.pdfIn PDF document text
    • http://vadepik.epizy.com/adb_install_apk_command.pdfIn PDF document text
    • http://tefugutofug.rf.gd/calculator_plus_apk_mod.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_off000117f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F5 5468 bytes
SHA-256: ed045bb8d6c364905db7f7d1160abe218b74290a757eada297e1d3b6f56cabe3
font_01_sfnt_off00012a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A77 12320 bytes
SHA-256: 47d62c6cd0f01133a738f350333f6ff78eed09e4e92e3fdc780640aa7d5ab6ba

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