Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bfcc7e3faa4c9b…

MALICIOUS

PDF

90.6 KB Created: 2021-04-24 00:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dc4aefbfd6af0a4e8e3c9632f49e6a84 SHA-1: 7f73f66724eb189a82e3c9128a796ea8e17cece9 SHA-256: 38bfcc7e3faa4c9b4bd2a34e85a8e9b041b47a2c44becdcce63db740f68b74b0
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, indicating it's a phishing or trojan attempt. The document body, though heavily obfuscated, contains text related to audio equipment setup, likely a lure. It embeds multiple URLs, including one pointing to 'nipisod.ru', which is a known malicious domain, and another to a 'weebly.com' subdomain, suggesting a link farm for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+to+turn+on+zone+2+onkyo+tx-nr656 PDF link annotation
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/7246095.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/pirejufe_xasuwuvibatuvo_japux_risoxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_604a2ed0ef431.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/ridaviwupafoleluk.pdfIn PDF document text
    • https://cdn.sqhk.co/lojumisebu/2aAigS6/69425141042.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/Ugfxqjj/nimenixuwenixuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_603b058b89a42.pdfIn PDF document text
    • https://donobemibuv.weebly.com/uploads/1/3/4/5/134512533/nosupilotoseni.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/dJiaifL/green_bay_packers_game_today_score.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/gdjeT9o/dog_wallpaper_4k_hd_download.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/253f815af10.pdfIn PDF document text
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/dozafez.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/gcShfhj/jenusemaketajefivuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e402e05f-c1f4-4845-a2bd-a48bdfc08dcd/how_to_connect_a_new_remote_to_a_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e2c5a5-3972-4cb2-809e-1b8b51e52a7b/wedukewuwejiminuzejiwuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/dc_museum_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/62596266371.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/52277927489.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/defiant_led_flood_light_home_depot.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/55446397685.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 5040 bytes
SHA-256: 9c6dc8302310bf22d186bafef90c8afb10a1bf621588bcf426571b60d9090e99
font_01_sfnt_off00011e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 11916 bytes
SHA-256: 896d9c8ea9e02679f4095e6efe76c313bf7a4a707194dbc1e2cea8dbc0d8069a
font_02_sfnt_off0001466a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466A 16100 bytes
SHA-256: 81df128cea868eaba23e1e02046cb29107bbb45a00372b91a1e759d3b0a3c515

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