Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33d0297bac30f39…

MALICIOUS

PDF

72.1 KB Created: 2021-06-05 08:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 422a4eb597be90a4b4717846ebcbaab0 SHA-1: 702ee34c9f711412b94f574d5090014e429496b9 SHA-256: c33d0297bac30f39e15983cefec2af2fc827e8e25d334a2f93ca179afe9c87aa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://inwebjor.ru/pbw?utm_term=what+does+forging+a+signature+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413843/normal_601ecb8ee0b5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_604cba9854aa4.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/bavukogozofe.pdfIn PDF document text
    • https://vorusasu.weebly.com/uploads/1/3/2/7/132740845/korotoja_xixaged_donogekunimuwal_zarexumevatire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5fe9dac5e6dc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448323/normal_5ffb884f8a2a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fd34883e80c3.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/788607.pdfIn PDF document text
    • https://xaxotomelaxip.weebly.com/uploads/1/3/4/5/134511260/kiloxeta.pdfIn PDF document text
    • https://tenewalewufubin.weebly.com/uploads/1/3/5/3/135329800/0c799.pdfIn PDF document text
    • https://wiwetone.weebly.com/uploads/1/3/4/6/134660192/jafewopufamunozaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_602e2c8fae8fe.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/vaxavipadaxa-nunusojewalonun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_6031f1fef24bf.pdfIn PDF document text
    • https://tedatigajixa.weebly.com/uploads/1/3/0/7/130739480/rojemiruro_tafibesatitaju_pesem.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/92aa2c36-528c-498c-88cc-937cc5024beb/63246331629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9746cd0d-a2df-40bc-be52-b66153b2db23/87261760216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc41f6c-18db-4a36-b212-ed2a68cce9b1/is_dell_a_good_desktop_brand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edc78bd-6dc5-4676-adc3-459f9c7cc20a/39947396132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d76181-ae6e-4699-bca5-34f76102db15/coreldraw_graphics_suite_x7_crack_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1f50a2-e318-4ebc-af4a-cd4258bfae45/who_has_the_most_clean_sheets_in_premier_league_18_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d8816a-e484-4a82-ac29-5dcfa6857afc/capacitacion_y_desarrollo_del_personal_alfonso_siliceo.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_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 5304 bytes
SHA-256: d9ba056f5c62bfdba4ed088206ebdc6998a5bf6a28df6f6cad856a96132b5a34
font_01_sfnt_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 10052 bytes
SHA-256: 98f0a439ddfbf2fed9375768136af3eecc100c186bcfd85f5423f267b63989c0

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