Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ba2eea39e983b4…

MALICIOUS

PDF

76.1 KB Created: 2021-02-17 16:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae530cb2304c17c45594a40677fd505b SHA-1: 25022fa6bbc38d7543959e72281bb8d58440d122 SHA-256: 23ba2eea39e983b4b64b8db15988f82a0d08b2c0c02315b928f1697de8b8d2ad
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 0.9998

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://jottigo.ru/wix?keyword=crestwood+library+yonkers+new+york PDF link annotation
    • http://strapslap.online/51102193498yvjt8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_600183930ac76.pdfIn PDF document text
    • http://olivamebel.com/57579410477sxqi1.pdfIn PDF document text
    • http://top-salez.site/lamanenalepivom1oow.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/lgcxWo2/sijito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6010cd1466193.pdfIn PDF document text
    • https://cdn.sqhk.co/pakuvesajuwo/nohibhh/lesson_plan_example_for_high_school.pdfIn PDF document text
    • http://antileqphh.site/1834975553759fke.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/crane_load_test_reporteyyob.pdfIn PDF document text
    • http://repair-telefonov.ru/25277411435nxpkb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_600cbfb170ef0.pdfIn PDF document text
    • https://cdn.sqhk.co/buruvalufe/zhfxjjY/4875803588.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/gdjcidm/gachaverse_rpg_anime_dress_up_gacha_life.pdfIn PDF document text
    • http://retapobu.iblogger.org/regudapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_60102738d9822.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/fge3jg2/41666034237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevepapowiwed.epizy.com/monthly_planner_template.pdfIn PDF document text
    • http://temekem.epizy.com/10312106315.pdfIn PDF document text
    • http://wijixetav.epizy.com/nituvuzelebisaja.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_off0000ed18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 5124 bytes
SHA-256: 50dbbc95fdc0f925dd49ec860ac8ee689e7c392d31105a3a69fbf118cef3634b
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 10752 bytes
SHA-256: a5ce9df7a0b4777fdbb781d11a28e4585a2bafdfa3dfdd5b277ab36f6c2a42be

Open this report in the interactive analyzer, or submit your own file for analysis.