Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c36dd1b93a81746…

MALICIOUS

PDF

85.3 KB Created: 2021-02-16 09:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aa736a31919dd7d1e2badd24412d8bbd SHA-1: de1ef1d1ac0687e639c5572dee81628198bea162 SHA-256: 9c36dd1b93a817469d3f120e08f6d13e01a7a6e453ca3fd9837af0267f7c13e8
156 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. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/wix?keyword=political+cartoon+analysis+the+anaconda+plan+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499351/normal_5fd666f7351c6.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/ghfVieZ/94951571919.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/fYoieZF/guidestar_990_login.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/cjgjeva/vikings_schedule_today.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/7964593.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/V7bOidW/t_mobile_5g_home_internet_review.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/2yKsBkA/slime_kit_videos_please.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/ajejhar/muppet_puppets_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/3ifNjhC/92235211041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_5fd17089df4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_602784a59b688.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/gghgggj/word_search_puzzles_online_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_601af222eef7a.pdfIn PDF document text
    • https://solusolifodijal.weebly.com/uploads/1/3/4/4/134433047/572a259d6ea6d.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/2jijbmT/dub_dash_cam_reviews_consumer_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/hbggha6/14181041130.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/ielNbgd/27440030739.pdfIn PDF document text
    • http://nugitesa.iblogger.org/36161386751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budotosofikidul.rf.gd/antimicrobial_susceptibility_testing.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_off00010e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 5420 bytes
SHA-256: 7dd739889eb2a201624e0a6d27d9040b28b5e035df83d04f22ce352456a96df2
font_01_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 11316 bytes
SHA-256: b861bfc6abfccb59e57e4b7415918a6f767ce2b57832023874f8a5d607c47607

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