Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e94c81d9d58231…

MALICIOUS

PDF

83.8 KB Created: 2021-04-08 10:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 494ba2f09c20fe33ebd8e238ddd18fed SHA-1: 72fac715da854808a61b2b50f88f8bdb909dba1c SHA-256: f7e94c81d9d58231691b169905ae8bd9ccc28225e43238c5afe111f1e2a202f2
186 Risk Score

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=earn+to+die+2012+unblocked+weebly PDF link annotation
    • https://cdn.sqhk.co/mavixuwaloz/5pSOSW4/simon_the_sorcerer_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hh9gc5X/118125876.pdfIn PDF document text
    • http://mazanatur.space/1250490341rrsgu.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/1461253.pdfIn PDF document text
    • http://nutristrike-shop.ru/wufibepofobegaf7k5hr.pdfIn PDF document text
    • http://doordash.link/ill_be_gone_in_the_dark_tv_show_trailerl05wz.pdfIn PDF document text
    • http://meriline.store/makawiwxhnp4.pdfIn PDF document text
    • http://sosed.market/39282275131cotbo.pdfIn PDF document text
    • https://rukupapafi.weebly.com/uploads/1/3/0/7/130739745/d0ec4cd.pdfIn PDF document text
    • http://themarkuzmusic.com/totagakozagusabumodolebdwf1.pdfIn PDF document text
    • https://mamubata.weebly.com/uploads/1/3/4/5/134598765/sajubuvivafeju.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/dKyIygi/larry_h_miller_theatres_inc.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/4OjcHhb/boneless_skinless_chicken_thighs_baking_sheet.pdfIn PDF document text
    • http://haifaiv.ru/771793542373voz.pdfIn PDF document text
    • https://cdn.sqhk.co/winanuwumovu/6giApge/liroviwuteru.pdfIn PDF document text
    • https://cdn.sqhk.co/zumumolebajo/6gifyB7/18702880388.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/hPiihi6/brain_up_app_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/gjezgiF/podoxokeladuzawi.pdfIn PDF document text
    • http://tcerkovniekupola.space/josabodebufibezuzufojik5zmd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibotiriponikew.rf.gd/personal_career_development_plan.pdfIn PDF document text
    • http://muwaziri.epizy.com/uspto_trademark_statement_of_use_form.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_off00010829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 5436 bytes
SHA-256: fc2be23dfaa9ba4d4fd0e42f21a38036868b3253e634378ee07343dd5d49b23c
font_01_sfnt_off00011ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD4 11800 bytes
SHA-256: 36fa0d93fdfe6e9c357d65d871fb4f7fc836f8da6a1a0019f953162fd77ba9bc

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