Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcc1c19c9b09983…

MALICIOUS

PDF

94.6 KB Created: 2021-02-28 12:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ebd533f1cfea441bc39beb8c76299648 SHA-1: 536c3ce92f20503e0dda586c929f20014df527b5 SHA-256: 6dcc1c19c9b09983bac9a5126ab2c8db1d90875cde379f3d65e82a553a808c0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/wix?keyword=flvs+spanish+1+segment+2+answers PDF link annotation
    • http://xojetupamowub.iblogger.org/92996790665.pdfIn PDF document text
    • http://genusadnlo.space/xeluxalokatabexorewaxexi0pdsy.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/nirovawumuginujarifebido.pdfIn PDF document text
    • https://taxupati.weebly.com/uploads/1/3/4/8/134891344/zedapororedu_vozudasemepos.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/patch_league_of_legends_10.9.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/60437352205ddl8k.pdfIn PDF document text
    • http://znakomstva18x.site/22092159659rzrgx.pdfIn PDF document text
    • http://lewizakadogera.iblogger.org/22037038583.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/5854707505.pdfIn PDF document text
    • http://freshmind.net/xegesogorodixamoegfm7.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/ms_wireless_keyboard_2000_not_working.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/85971641695.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/2.0_tsi_vs_3.6_fsi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lironif.epizy.com/67368171448.pdfIn PDF document text
    • http://vovijez.epizy.com/android_notification_sounds_through_bluetooth.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/best_stock_broker_for_beginners_in_india_2020.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/xegefubuvitibadanidenab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 3620 bytes
SHA-256: 94b16569ad32316eee8c818d8b1e5a10f531c87db29285d2bba48f233eaf2b44
font_01_sfnt_off0001280c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280C 5524 bytes
SHA-256: 57357236ad100138137a34a49da1840c910ec1e5a030f1a6dc4e7738706bdd12
font_02_sfnt_off00013acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACF 16016 bytes
SHA-256: 8601abf4d4bb87fe4be4a1b5885a910a1f5375c17089d8b5f5b4d743e060cd79