Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b80c54ca5e73464…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 10:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 45b27e264e6caa09ec617e5bb039fc5d SHA-1: cdf5ba7d87fe205436ad754c721d7431fa28e76b SHA-256: 1b80c54ca5e7346405432752a1c5314cabe382ee519c9c895136851adc5fec05
126 Risk Score

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 0.9955

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 http://tostonet.cl/ckfinder/userfiles/files/badelunisaki.pdf In PDF document text
    • https://taxforce.nl/userfiles/files/99608895484.pdfIn PDF document text
    • http://prompol.com/media/file/jipojatiwavonejofilepukar.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/nirejaku.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/10271208403.pdfIn PDF document text
    • http://vitrine-prof.com/files/sawosakutafevijiripatilew.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/40147595736.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132870e632ef---49305724371.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/51494044162.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/64918984255.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/mobasodapixutubebiwub.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/votejakatobisudozuz.pdfIn PDF document text
    • http://knipia.com/userfiles/file/fedusadokazevatuf.pdfIn PDF document text
    • http://zeci.nl/im/image/wotasuzilefezam.pdfIn PDF document text
    • https://0900107678.com/upload/file/86647020445.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210906130554.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/u0c90e87lsv257uo6lhdkicdtq/donevigojabu.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/nikumopotisovenola.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/58815750887.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/70794726944.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/mabebafalulowebam.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/napuxemozulikogirala.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/zisipapipuwuwapobej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=android+ul3+0+ebayPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/91808448065.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 17296 bytes
SHA-256: 4f541320d375e1660eb2b49cb52b57fc0f3cc7636ba07979675645a60ae389d0
font_01_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0D 10604 bytes
SHA-256: 7406e98ce4c7393fbb401151482db7c8247887bc8d687cdcb666307bebdfd3b9

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