Malicious PDF — malware analysis report

Static analysis result for SHA-256 03918dd906ae0767…

MALICIOUS

PDF

68.5 KB Created: 2021-02-27 05:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 76139d7c06948c700db35bbe86a5bbd6 SHA-1: 5cab8aa66277c6ca7a7d29ca5f677e9261ea25a3 SHA-256: 03918dd906ae0767f85d7803481f095c55a696ef222684b234dc21601b7cec0f
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of external links and the heuristic findings strongly indicate a phishing or malware distribution campaign.

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/strik?utm_term=taco+bell+hot+sauce+calories PDF link annotation
    • https://cdn.sqhk.co/zetanitanedo/M8vyha3/cat_wars_book.pdfIn PDF document text
    • http://my-favshop.online/7850702800gqbut.pdfIn PDF document text
    • http://outputqwvk.space/teamviewer_version_11_freee7z4i.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/lheihFQ/bloons_tower_defense_6_hacked_unblocked.pdfIn PDF document text
    • http://gtomishebs.xyz/bejutojieysya.pdfIn PDF document text
    • http://vittorguxx.site/echo_plus_2nd_gen_vs_echo_dot_3rd_gen5xjkg.pdfIn PDF document text
    • http://instas.site/rakevajutejogudipezupa3k3.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/uwHiDgg/jungle_survival_games_online.pdfIn PDF document text
    • http://genoray.pro/phonics_practice_worksheets_1st_graden8m6b.pdfIn PDF document text
    • http://firstflirts.site/64567428570huzho.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/digozatifutivuwika.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/contoh_report_text_tentang_television.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/ardas_kara_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/english_fonts_pack_2018_free.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_off0000d040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD040 4976 bytes
SHA-256: b443dc25404e3baa3b32b045d4a9d456d174c6a8faeff7618d9bb562af3a7716
font_01_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 10476 bytes
SHA-256: 4474d0c19d3fc7383b019614eb3ccc02b2479c2b770644974ba75d83c2681cc0

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