Malicious PDF — malware analysis report

Static analysis result for SHA-256 2032ea6fb38310af…

MALICIOUS

PDF

81.2 KB Created: 2021-03-25 22:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 600593da33ede5e8278430cf204e725d SHA-1: 7586eb19b845af790bbff163f19b8fc50fd1d601 SHA-256: 2032ea6fb38310afda27c9d0026573b2e205c103ecf9cb1131a5020b7d8a4b1b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://resalured.ru/123?utm_term=all+items+on+balance+sheet
    • http://juzufezike.mygamesonline.org/ser_bachiller_preguntas_y_respuestas.pdf
    • http://vogudikomi.getenjoyment.net/30677255372.pdf
    • http://mini-cam2.club/wowemivukavuiygl7.pdf
    • http://goguduve.iblogger.org/nupinosuduxugu.pdf
    • https://cdn-cms.f-static.net/uploads/4471081/normal_5fe8783abbdb6.pdf
    • http://kogavegafekaw.22web.org/companies_acceptance_of_deposit_rules_2020_mca.pdf
    • http://jezugelevafebir.22web.org/dark_business_website_templates.pdf
    • http://wovoradomumakil.medianewsonline.com/73530261316.pdf
    • http://gebuguwuvuma.iblogger.org/lojuxemimotovovelozudob.pdf
    • http://comp-arenda.site/vafawepedeji0gcoq.pdf
    • https://cdn-cms.f-static.net/uploads/4457854/normal_6037bd01acf4c.pdf
    • https://cdn-cms.f-static.net/uploads/4444638/normal_60349e34b12d2.pdf
    • http://igclienteam.com/vumijopize6mgqt.pdf
    • http://xenalebosob.scienceontheweb.net/materi_sejarah_asia_selatan.pdf
    • https://cdn-cms.f-static.net/uploads/4485152/normal_600d7b7dd7051.pdf
    • https://cdn-cms.f-static.net/uploads/4407813/normal_6053bcde9f4d4.pdf
    • http://3-bureaureport.info/gikekofonaninebige25mqy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sewasijibakel.epizy.com/35630463061.pdf
    • http://dozonexupiwef.epizy.com/cg_new_dj_song_free.pdf
    • http://dazozelagur.epizy.com/decimal_maths_worksheets.pdf
    • https://s3.amazonaws.com/kujapomib/ninima.pdf
    • http://wusozugidiwe.rf.gd/24887633839.pdf
    • http://nejovafejasujob.rf.gd/what_is_the_most_played_song_on_soundcloud_of_all_time.pdf
    • https://s3.amazonaws.com/nilititonawafim/warlock_guide_wotlk.pdf
    • https://s3.amazonaws.com/sizabo/thundercats_cartoon_full_episodes.pdf
    • http://kakavogulogij.onlinewebshop.net/30135612083.pdf
    • https://s3.amazonaws.com/roxawo/ranzcog_prenatal_screening_guidelines.pdf
    • http://latarugumajovi.epizy.com/ez_activator_for_windows_10_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ef.bin
b24bd3093e1a7f1cd14feae694f7256e6f867069b426fe6f9efaabd20929df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 4860 bytes
font_01_sfnt_off00010440.bin
cdb8bc3af2b453548e53073dd0efadd3d4698da8c39308fe0a3491df8d152acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 10980 bytes
font_02_sfnt_off000128a1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 4324 bytes

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