Malicious PDF — malware analysis report

Static analysis result for SHA-256 452d7f514b9cccee…

MALICIOUS

PDF

70.4 KB Created: 2021-05-05 04:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50101ff8fef8b51b859f5cd0c86c2518 SHA-1: b0ad424848586837326888833ebb2ffab94e7991 SHA-256: 452d7f514b9cccee3e4f970f7aa2d1ee4a8e307ad952ee4896257febb8ed38d7
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to a URL containing 'how much do you make working for monat', suggesting a phishing or scam lure. The presence of multiple disposable domains and link farms further supports a malicious campaign aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=how+much+do+you+make+working+for+monat
    • http://laithub.pro/is_the_new_testament_written_in_hebrewb7yxv.pdf
    • http://gekiwejal.scienceontheweb.net/79207878386.pdf
    • http://astropsychology.site/best_netflix_s_october_2018wru8x.pdf
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5fdacb78bf16f.pdf
    • http://letabumo.getenjoyment.net/canula_de_guedel_tamaos.pdf
    • http://termometr-medikal.site/68677466914cge7x.pdf
    • http://bonmarket.site/06_scion_tc_engine_rebuild_kittjnod.pdf
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60454399ac8c3.pdf
    • http://livecopyrightverification.com/best_tarot_spread_for_beginnersmemb1.pdf
    • http://lnstagramcopyrightcenter.com/plantas_angiospermasaba6z.pdf
    • https://static.s123-cdn-static.com/uploads/4463306/normal_5fe4c4876dff7.pdf
    • http://megatorg.ru/writing_good_thesis_statements_worksheetgr62c.pdf
    • http://ndfnasg.xyz/malarewozidimululidebuyulb.pdf
    • http://olipaka.xyz/messenger_rna_mrna_technology1yh9o.pdf
    • http://ravigimojamel.mypressonline.com/powudawixojudig.pdf
    • http://xawamiwupajev.mygamesonline.org/61177755923.pdf
    • http://dasiwujupuna.sportsontheweb.net/lezodutabidi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuniwivufe.rf.gd/40727593776.pdf
    • https://s3.amazonaws.com/lowuwofuxali/social_animals_movie.pdf
    • https://s3.amazonaws.com/wipotegadodorek/sat_test_centers_closed_near_me.pdf
    • https://s3.amazonaws.com/ganubifirigevi/pugamemi.pdf
    • https://s3.amazonaws.com/subopukomanaw/action_items_template_microsoft_word.pdf
    • http://mududexabaxame.epizy.com/manualidades_con_carton_pluma.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_off0000d41e.bin
f52766e1eba71ddfabd6edb222b9954615637fdea20ddb9b6055b5caa55b6149		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 5444 bytes
font_01_sfnt_off0000e692.bin
474ce89f2739955bd1c30aafb5d3c40a69463d37092a34e064c8d9a923c55f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE692 11384 bytes

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