Malicious PDF — malware analysis report

Static analysis result for SHA-256 5042d99eaa8e24fd…

MALICIOUS

PDF

77.1 KB Created: 2021-03-06 18:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 21c368a3b699ca61bf9288bb06426995 SHA-1: a756fa52a53f77031f8cc0a0a2d672579d4e95ea SHA-256: 5042d99eaa8e24fd43240d51aa72ee2de58ed32af085e7df68aea3b4dd881f44
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, with a significant number pointing to disposable hosting, indicating a link farm designed to redirect users. The primary malicious activity observed is the embedding of multiple URLs, likely intended for phishing or malware distribution, which is consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=what+is+organizational+behavior+definition PDF link annotation
    • http://bamiluzigu.mygamesonline.org/how_do_i_pair_my_fios_remote_to_my_tv.pdfIn PDF document text
    • http://vinamituloj.22web.org/99393904197.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/how_does_yeast_infection_affect_a_woman.pdfIn PDF document text
    • http://podarokinsta.online/book_report_format_for_fourth_grade09syh.pdfIn PDF document text
    • http://ziweninuxepip.iblogger.org/kikopejifasozem.pdfIn PDF document text
    • http://bridgecommerce.com/xebobozubebitugozovifepuskltio.pdfIn PDF document text
    • http://hq-cleartv.info/fandango_michael_mclean_sheet_music7q9ko.pdfIn PDF document text
    • http://dazarutos.22web.org/can_hp_pavilion_dv5_run_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nirozat.rf.gd/musefebagaxopiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/badshah_the_don_full_movie_480p.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/how_to_clean_keurig_2.0_water_filter.pdfIn PDF document text
    • http://nopasemetefut.epizy.com/sodafijejivin.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_312e95c1e6d342fdba6f87dab4bf5000.pdf?index=trueIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_8ae9fd3712d24b2b860c4ac98e3627d5.pdf?index=trueIn PDF document text
    • http://mugazukadum.onlinewebshop.net/music_2252_osu_syllabus.pdfIn PDF document text
    • http://mizebud.rf.gd/26416375580.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_517113de2be343e5beb276b60922c4cd.pdf?index=trueIn PDF document text
    • http://wikenazuvoke.epizy.com/how_to_install_ink_cartridge_hp_4500.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_3484266135d744f9bd79600a42f2a06e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/rivonibetonigem.pdfIn PDF document text
    • http://duginefasozuna.rf.gd/nufusawuvivewolif.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_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 5432 bytes
SHA-256: 6dd97ce40d314e5861d78225c8736e25871cf7d517abed077af6a78ab1e453b6
font_01_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 10304 bytes
SHA-256: c8e4544502154cf0c0e04d6f8500c0cef1dd8335f82f68ae19671525cdc5e6f5

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