Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d0c21b84d61b82…

MALICIOUS

PDF

82.7 KB Created: 2021-09-12 06:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d9e45feb2e4ba6f75beb464d55ca853b SHA-1: bfad98282e18b546639dd5747d3f52017658873a SHA-256: 80d0c21b84d61b82022fd3bb2be120797f10b7d8ea90be7da437191161ae4b37
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 0.9974

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://ebus.cn/up_file/file/zutaxoxojufoxato.pdf In PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/74432625229.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/88771712789.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d3a0f1c8e64631455b603294030ebb6f/dipivemurukuselamabuxosu.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/donusutusotaxowibi.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/57635883625.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/soripujusodelegadez.pdfIn PDF document text
    • http://technocom.pl/editor/file/woxibusodojekedamudu.pdfIn PDF document text
    • http://azizolace.cz/images/file/saduzewu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337c5214ed5---laziwusubi.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/dazolizi.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/lidakofijaxisutofor.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/xenuvuwutuvopijukow.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/kubizu.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/topisunotadenim.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/15594586583.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fofopuno.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/58475257242.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/xowapawotoxoxedepotep.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/10140932583.pdfIn PDF document text
    • http://tootooair.com/FileData/ckfinder/files/20210909_D9FD494261B4A43E.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/98648835461.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/sefepilopegasigoru.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/wanotirizul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=android+smartphone+ranking+2020PDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 17408 bytes
SHA-256: 92fa1f86e5a46967914363e91064e59d281db17de7ba2d9fa20453096b8fafe9
font_01_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 11108 bytes
SHA-256: aa3b62d60a430d4b81e693dc2b17364d752858a83dfa0b43efefbbbccfb7fbfe
font_02_sfnt_off000124bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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