Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a861c5759b8b6a2…

MALICIOUS

PDF

127.7 KB Created: 2021-04-29 18:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 112c2581dcdd755e7b7bb05dce3b5946 SHA-1: 0613605cb9514616cfb9039b17856df7c4ecc952 SHA-256: 9a861c5759b8b6a24d9e5ad651dbcab77c0318d845c7143cf2d2801d45ec0cf9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable domains and suspicious URLs, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, includes a lure related to 'The Crown' cast, likely to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=the+crown+cast+season+1+margaret PDF link annotation
    • http://copalofa.site/hand_saw_identificationax8w4.pdfIn PDF document text
    • http://meetsalle.xyz/the_essential_theatre_chapter_17oepib.pdfIn PDF document text
    • http://idealicaitalia-official.site/mt_mi_tn_di_chuyn_trong_3dmaxdys83.pdfIn PDF document text
    • http://libralab.digital/9939537537850q05.pdfIn PDF document text
    • https://lalupapetawosi.weebly.com/uploads/1/3/2/8/132816164/7225958.pdfIn PDF document text
    • http://xifuponek.iblogger.org/mowenukakisoda.pdfIn PDF document text
    • http://instup.xyz/co_operative_society_audit_report_submissionzm81v.pdfIn PDF document text
    • http://dress-russia.ru/wimakufeverarigofut7v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_602b71b52afc8.pdfIn PDF document text
    • http://mpvideo.org/jackson_township_pa_police_reportskdhuq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458852/normal_6067d084cfb05.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/kugobuwuzok-ranejikotifaw.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/cavatina_deer_hunter_guitarn07qe.pdfIn PDF document text
    • http://waguzeb.66ghz.com/54478487713.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/506bd578-4ac6-4cdd-9185-724e4e6f6626/tupaxalibuxulilorigise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea9db13-f9a2-4913-9dae-f300f4061111/vampire_diaries_season_8_episode_9_english_subtitles.pdfIn PDF document text
    • http://lipelizirivalul.epizy.com/gelewebumibujidew.pdfIn PDF document text
    • http://wedemato.rf.gd/wings_of_fire_book_2.pdfIn PDF document text
    • http://talanusedos.epizy.com/cardiopatias_congenitas_cianoticas_e_acianoticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09259157-2370-427d-9192-39005ed62e28/72818540100.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_off0001b533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B533 5272 bytes
SHA-256: f51aedcb6cc1c27adc88b969cfc2dad3427692610e227e4c15ef9bb6648eefae
font_01_sfnt_off0001c714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C714 12888 bytes
SHA-256: a6f92171e4e88bbff0aaba65e0f7e05a504d295fbb7b6ab5cdf9e6b2a8246cc5

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