Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ef748c7eca79af…

MALICIOUS

PDF

85.2 KB Created: 2021-03-19 23:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 494183319cbfbab3da536396c4b1c764 SHA-1: 71f24f36a0ad397e8e078518775459d09b543488 SHA-256: 03ef748c7eca79aff799cc0d2b5e4722aeb733e820d5b01b685ad3b6a5314f07
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 0.9998

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://xezojetit.ru/123?utm_term=bengali+dj+dance+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371790/normal_602ab401b429e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_602c35fd93c2e.pdfIn PDF document text
    • http://arm-watch1.club/kexipasowiluxezavodig78fg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465941/normal_5fe3c0a3f3721.pdfIn PDF document text
    • https://lonawojalokofa.weebly.com/uploads/1/3/1/3/131382346/4818401.pdfIn PDF document text
    • http://vutatux.22web.org/houston_texans_injury_report_week_8.pdfIn PDF document text
    • http://romeita.fun/winagiso2dg.pdfIn PDF document text
    • http://fanegasubi.iblogger.org/xumekalotika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_5fe1a78ad6fe8.pdfIn PDF document text
    • http://pubifirona.22web.org/ahb_antrag_deutsche_rentenversicherung.pdfIn PDF document text
    • http://vashastrahovka24.ru/big_bang_korean_armyq9kgv.pdfIn PDF document text
    • http://zexedebamuwep.iblogger.org/can_you_work_during_covid_19_if_pregnant.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_6046e2a992cad.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/birofanapub.pdfIn PDF document text
    • http://wejutejejuwow.iblogger.org/xojepuviritufuni.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/19491084306.pdfIn PDF document text
    • http://cleaner360.shop/begomce1tg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusebirenox.myartsonline.com/digital_drawing_for_landscape_architecture_free_download.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/komoninegivilefi.pdfIn PDF document text
    • http://filexumif.epizy.com/tirunopitazagososimal.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_off00010e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2E 5136 bytes
SHA-256: 48d9b32f01c1c04b7a7cf2127dcb293d95ea00718aec0c39a4b7b480a09bc2d2
font_01_sfnt_off00011fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 11384 bytes
SHA-256: 3eb0641aedc3419e7348338d8abc64584c5240c041efa77027a09db4affcc31d