Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa5fc849e4c29e4…

MALICIOUS

PDF

72.6 KB Created: 2021-02-26 23:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aaac80929f565e044c4250cf182f8af5 SHA-1: 23cf0517309b406fb2b660e466687095381a5d4c SHA-256: caa5fc849e4c29e407ab2e1ecf32ea3763678ad3c8b0de10099de2e1949e6bb6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, including a link farm heuristic firing, suggesting a primary purpose of directing users to malicious websites. The embedded URL and the document body, which contains a movie title, indicate a lure to trick users into visiting these sites. ClamAV detection and ML classification confirm the malicious nature of the PDF.

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 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://fokemale.ru/strik?utm_term=un+tranv%25C3%25ADa+llamado+deseo+pelicula+completa+espa%25C3%25B1ol+online PDF link annotation
    • http://naturwow.space/mogugogagurirowh8ci.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/fusago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487918/normal_60096108a750e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5fd06ec30b2f3.pdfIn PDF document text
    • http://tosety.xyz/whirlpool_dishwasher_repair_manualuq4mq.pdfIn PDF document text
    • https://zuwexonoporij.weebly.com/uploads/1/3/5/3/135317719/xupojugipik-rowiluxaxadiwok-rifix-zodonimij.pdfIn PDF document text
    • http://matteset-spon.space/natewapedevuzhebgx.pdfIn PDF document text
    • http://rokagovisalojop.iblogger.org/honda_express_200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_602e6588b0f1e.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/xozojonuxekonupidob.pdfIn PDF document text
    • http://kleomaften.online/inventing_merit_badge_answersrxk9f.pdfIn PDF document text
    • http://siwarezowagi.iblogger.org/multiplication_grid_method_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6020aa7a27a2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dofufiri/givomuwobatitexositexopo.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/spider_man_4k_wallpapers_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/used_tesla_model_3_performance_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/ecological_pyramid_pogil_answers.pdfIn PDF document text
    • http://gidetux.rf.gd/jivutekoz.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_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 5536 bytes
SHA-256: a6c2de264e806de37423c4113c3c3990251000a7417d2247323f9522977b604d
font_01_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 11180 bytes
SHA-256: a491cd70576dac1fa5e888a130181766806be0273b0292f5b165dfcf69fc1528

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