Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba90e6fa868b5d6…

MALICIOUS

PDF

91.0 KB Created: 2021-02-26 13:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 1fd9726dd20acddb8f7a7cd19e23e277 SHA-1: 5dc78e4403baa403f1a1ba1194826ca239e25adc SHA-256: 4ba90e6fa868b5d6caacc414470b29d4014fff149ecf3423ac7b94870e7fc7ca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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://golowaki.ru/wix?keyword=latin+and+greek+roots+book+answers PDF link annotation
    • https://cdn.sqhk.co/pulizojiwim/hbja1Am/95075092396.pdfIn PDF document text
    • http://fivepazako.22web.org/46088188535.pdfIn PDF document text
    • http://zazerabila.iblogger.org/barish_song_yaariyan_movie.pdfIn PDF document text
    • http://xafegadixugu.iblogger.org/what_music_did_the_cellist_of_sarajevo_play.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/70901102426.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/cgjBhgq/download_tiktok_di_macbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_5fe966996ece5.pdfIn PDF document text
    • http://katopikinu.22web.org/fedifusaj.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/dell_optiplex_7020_launch_date.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamuxeg/FgHgfjc/amlp_stock_split.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/xh2igji/unblock_me_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5ffde3a08aa6b.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/hjy4D1w/wood_carving_patterns_ideas.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/samsung_blu_ray_bd-j5700_apps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_602c87894d353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://waxivetik.epizy.com/online_flowchart_maker_for_c_programming.pdfIn PDF document text
    • http://fukorow.epizy.com/fabafejumejisoxuwo.pdfIn PDF document text
    • http://pexapoxulimexu.epizy.com/is_greenworks_going_out_of_business.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/50800598779.pdfIn PDF document text
    • http://dusiwesidixe.epizy.com/verbo_applaudire_forma_attiva.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 4988 bytes
SHA-256: 0d54b62f8f0769974009cb8dd2ca6830889779acd0a270db42b34154a6268f24
font_01_sfnt_off0001160a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 10812 bytes
SHA-256: eee7b22bb0f5c8ccdaacd8955e46fb69ee5940d55fe46e467490fc2d4bbaf72c
font_02_sfnt_off00013b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B37 16064 bytes
SHA-256: e475b127670123e0992d690554a82105660adb0ac795948380663d104441f777
font_03_sfnt_off00014fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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