Malicious PDF — malware analysis report

Static analysis result for SHA-256 409dea9be84d0a94…

MALICIOUS

PDF

79.3 KB Created: 2021-03-27 17:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99cbec0e1658bd6d978cde92f77f732 SHA-1: 7aec4404ab29049a85683539aae52ec945acf759 SHA-256: 409dea9be84d0a94e8bcf954faab1f94dda1e50cff566e863edcda0db0c36dde
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'dafemum.ru', which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a deceptive title related to movies, further supporting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/123?utm_term=open+t+bioscope+hd+movie
    • http://russianpatentexpert.com/mufexetofa294rk.pdf
    • http://nalodorepuwag.getenjoyment.net/anatomy_for_artists_free_download.pdf
    • http://www-sfr-fr-monespace.com/428790967jfzkm.pdf
    • http://xepidenad.scienceontheweb.net/agnus_dei_sheet_music.pdf
    • http://daliadiago.com/358053248113bibl.pdf
    • http://fresh-ita.space/42937479829rauxc.pdf
    • http://rifijetuvijilam.medianewsonline.com/odevzdn_bakalsk_prce_upol.pdf
    • http://tifoxikutawe.sportsontheweb.net/wedaxebamisixapifola.pdf
    • http://foxilajat.sportsontheweb.net/how_much_pulse_oximeter_is_normal.pdf
    • http://ketadiets.site/wagixebazascw5m7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_11ee461722104cffa57a0b7dfa17d233.pdf?index=true
    • http://dikukezedigex.epizy.com/breathing_exercises_for_stress.pdf
    • http://sitafefisoju.atwebpages.com/hunger_games_tome_1_english.pdf
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_1be49750138b405194c55728ab180c33.pdf?index=true
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_3e6002aacb574d09b4e5153e4721cfec.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a2f08d83-2e65-465a-8ff9-493deb88b518/is_wendys_chili_good_for_a_low_carb_diet.pdf
    • http://tokeparab.epizy.com/wotiruxavudosalizugezakif.pdf
    • https://uploads.strikinglycdn.com/files/ecbad83b-427d-4646-a9db-068d7c11e67f/xexusarubuzo.pdf
    • https://uploads.strikinglycdn.com/files/c9b13880-2a08-48a2-8dc4-5dba818a2deb/homeschooling_online_free_middle_school.pdf
    • http://xufoziminep.onlinewebshop.net/65625219092.pdf
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_72287093e968413bb69175dc07ff28ad.pdf?index=true
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_28abe71eb4794184bb3ee85eb03a8783.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0fccc34-058c-4571-be51-287638c21065/stihl_ms180_chain_tensioner_replacement.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d1.bin
c368e01cfb60537620db35b37c84c74e7d0ebfe6b59422f7e2d3f4fb1b3a6610		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 5204 bytes
font_01_sfnt_off0000f859.bin
84ce778edf5cd2d335659354f40bdc61b26d6b842b0cac42b8ac5f6da15857b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 5316 bytes
font_02_sfnt_off000109b3.bin
edd96cd94bf7df19052f52368c1e0b88a0e6475c30b58d77067848909d54447e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 11352 bytes

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