Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d8598bbea83828…

MALICIOUS

PDF

74.3 KB Created: 2021-03-21 11:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434aed58272cacd41d00a6f4773b55af SHA-1: 9c4cbcbe5d053846e974e768dbdf01c6affdd266 SHA-256: 70d8598bbea83828bc81317873f5396be1c4d7e714ef65c25da16966c0e33de3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with a phishing lure related to real estate broker licenses. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=real+estate+broker+license+course+florida
    • http://takudogifox.22web.org/boss_tu-3_chromatic_tuner_guitar_effect_pedal.pdf
    • http://lanufutado.22web.org/backcountry_gear_guide.pdf
    • https://vaguvijag.weebly.com/uploads/1/3/4/6/134610999/5331277.pdf
    • http://vuwazakuzasoz.iblogger.org/korisumu.pdf
    • https://cdn.sqhk.co/tuwesedujila/iggckhj/snapchat_streak_ideas_aesthetic.pdf
    • https://regapopuro.weebly.com/uploads/1/3/5/9/135964604/veropawujak.pdf
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/kupevuwes.pdf
    • https://xibabajawaxas.weebly.com/uploads/1/3/1/3/131398380/9b0ce908c.pdf
    • https://cdn.sqhk.co/fubafonu/ZRekzog/coloring_book_pages_disney_princess.pdf
    • http://tevoriveterusof.22web.org/nctb_books_of_class_8_2020.pdf
    • https://cdn.sqhk.co/vakanaju/mjf1hjM/nwsl_soccer_league.pdf
    • https://cdn.sqhk.co/tekixonef/bgiAhtZ/47931155914.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tazopaju/89035520386.pdf
    • http://rebogarupoza.epizy.com/generekapuvodorenu.pdf
    • https://s3.amazonaws.com/bokelur/responsive_admin_template_bootstrap_4.pdf
    • http://baxuzotaxuli.epizy.com/38523802974.pdf
    • http://lodibusalibazi.epizy.com/76254012000.pdf
    • http://tinegomawula.epizy.com/auto_typer_by_murgee_v1._10.pdf
    • https://s3.amazonaws.com/tixedujegibex/libro_vaquero_descargar.pdf
    • http://gapevizatijaba.epizy.com/adverb_worksheets_free.pdf
    • http://fupuvomevo.rf.gd/kupiwedegiloxagorexibo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e558.bin
579d83e809ded5adb8ee54ff7309aa3777cea21128ea9eb5a4eb51e433bef6bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 5224 bytes
font_01_sfnt_off0000f733.bin
84b52d5572bedab7ed66280bd59525ccdb4bf100ea82a88b9d2c2aeb366c04e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 10668 bytes

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