Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfae78b2a093de8a…

MALICIOUS

PDF

153.7 KB Created: 2021-02-17 23:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b3200330cc28d12652c8d04558d3c0ab SHA-1: b1efd1c8fa6d1e6491ccae5959cf95580b1e97f5 SHA-256: bfae78b2a093de8aa5508aab2fad5a9f090306e2dcb6d2f7b2859dd549d2cb86
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/wix?keyword=instrucciones+planilla+2019 PDF link annotation
    • https://cdn.sqhk.co/wekonexiw/jfibUbe/planet_of_the_humans_back_on_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/4ijV0hj/fantasy_heroes_apk.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/6088458.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/jPd0JJx/byutv_app_for_lg_smart_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/rufigukuj/38ij568/football_live_score_today_match_watch_online.pdfIn PDF document text
    • https://rakumimow.weebly.com/uploads/1/3/5/9/135957304/vapega.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/2373fccafdc3c.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/r0hbtha/desezifexo.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/9yijhRi/free_sports_card_price_guide_app.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/88691510041mrd8l.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/b0Hljbj/disney_crossy_road_cars_3.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/tiwojakivifizugoxulo.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/i1DPdha/88176030001.pdfIn PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/tisufivosemi.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/3934452.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/povolajuv_pobazupete.pdfIn PDF document text
    • http://lotto-investclub.com/gujarat_mitra_surat_epaper_date_wisegu3zl.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/zazozenika-xatojizo.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/iHjcKOb/33170369882.pdfIn PDF document text
    • http://fly-drive.online/757671040250go2l.pdfIn PDF document text
    • https://jerarovisiva.weebly.com/uploads/1/3/5/3/135332562/652c864a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00021c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C72 5348 bytes
SHA-256: a3ceda0f84ee6a32306b87a0899ffa451015f4c05055af9bb8ceada19e03fa8a
font_01_sfnt_off00022eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22EAF 12368 bytes
SHA-256: 900262437c88d127dbcac18bfed75e15cbda676e227d3f72e47109decc13c981

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