Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3595487b598f31a…

MALICIOUS

PDF

81.7 KB Created: 2021-05-06 09:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 03eaf77de7a67958368da0ff7f35f559 SHA-1: b961f255c608b1994af227da4586a3fdaffcd1a7 SHA-256: e3595487b598f31a2f438f44f19fb8dbfc36904dcd75558a2b3f05e255b0011c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or scam campaign. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'Sat math 2 curve', aiming to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://golowaki.ru/strik?utm_term=sat+math+2+curve PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463532/normal_60618c3a200aa.pdfIn PDF document text
    • http://citruss.space/street_fighter_4_ce_mod_apk_obb2eckp.pdfIn PDF document text
    • http://lasiwefomibew.sportsontheweb.net/ligijababinatitor.pdfIn PDF document text
    • http://muldwych.com/miwawoxugekewosutuxamv8i.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/understanding_financial_statements_for_beginners.pdfIn PDF document text
    • http://meetchat.space/madame_bovary_2014_castm6sgi.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/MiiBUia/7653562410.pdfIn PDF document text
    • https://cdn.sqhk.co/kojagopomon/LDjjheq/java_jdk_mac_sierra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_60104e370df54.pdfIn PDF document text
    • http://on-arenas.com/naxigexepumuloxuvadazexx2rf.pdfIn PDF document text
    • http://myfoxing.online/diluzexu4wh2x.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/gfPgeIl/android_mobile_games_name_list.pdfIn PDF document text
    • http://youtube-subscribes.com/bodybuilding_exercises_without_equipment_video_downloadvgzjo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_60255a4a18317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_5fe8589ab69a4.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/l_aveuglement_livre.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450747/normal_6062c528daced.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/gchjHjf/unicorn_color_by_number_app.pdfIn PDF document text
    • http://noverst.xyz/suvuwuhokug.pdfIn PDF document text
    • http://vulgargirls.fun/car_mechanic_simulator_m3ssr1q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467593/normal_5fcaf8e387a7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_6019b0e361510.pdfIn PDF document text
    • http://creditscorecard.info/90695760560bpvaz.pdfIn PDF document text
    • http://tegor.xyz/76149945087yc5x8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_604d7b47e696a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidajalej.onlinewebshop.net/bacterial_genetics_book.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/celiac_diet.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_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 5124 bytes
SHA-256: 46ed6a7c648dce3b07aaef3236b4a300bb76eadf8484af868b2eca2dc78ca713
font_01_sfnt_off0001136a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136A 11028 bytes
SHA-256: ae64efe176a460d108bf0f392a2e218cba204f22eaa155eaab0c5622492551ea

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