Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc8ea5c0fadf528…

MALICIOUS

PDF

73.5 KB Created: 2021-03-03 19:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ca8f115477ad18b924fa1c6e3ea587f4 SHA-1: 9a02f97a0f8812bbdc133a55ba1acfc73e822559 SHA-256: ccc8ea5c0fadf5280a3a9b1c0547b762b9bd2f7649e7503b616327ad890cdb96
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/strik?utm_term=how+computers+work+ron+white+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497638/normal_6023bcc0be553.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/mejores_apps_finanzas_personales.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/68290256435.pdfIn PDF document text
    • http://gupirigugorixuf.sportsontheweb.net/lost_islamic_history_in_urdu_book.pdfIn PDF document text
    • https://sapuvitajesi.weebly.com/uploads/1/3/0/7/130776539/radugegowuru.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/36711054467.pdfIn PDF document text
    • http://shop-kid-toys.online/photoshop_tutorial_photo_manipulation_change_background__blending_tj2bc0s.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/54926292858.pdfIn PDF document text
    • https://lurafavef.weebly.com/uploads/1/3/0/8/130813461/suzareje-fuwisav-xodex.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/rusipipunaditomel.pdfIn PDF document text
    • http://yogist.fun/android_vs_iphone_security_2019xd07t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487431/normal_5fff1542edd90.pdfIn PDF document text
    • http://aicberg.net/930963516725tjaz.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/operations_management_degree_courses.pdfIn PDF document text
    • http://lotto-investclub.com/foxowuvujamupij2l939.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabatelekovufar.myartsonline.com/dachshund_coat_color_genetics.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_off0000e1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CF 5512 bytes
SHA-256: 608ce4c650f8209b39ea13377baafe9bfda5c025b393df01d90990b838abc0ba
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 10604 bytes
SHA-256: bb85fb610885be8ac84a26b8acc165f4d70ab76f8704d729fa59ade66e5d67fb

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