Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd754a34b44acd1…

MALICIOUS

PDF

85.7 KB Created: 2021-09-17 22:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 340e4c6b610277d978fb47ad43ee418a SHA-1: c6a767cc3b52fe809e570d2b6212633b657665db SHA-256: 5cd754a34b44acd102d433faadd5d852050ab938c02f7b42fcaa0b774de8c2f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. While no scripts were explicitly extracted, the presence of numerous external URIs suggests an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 https://n-v-v.dk/userfiles/file/34224865711.pdf In PDF document text
    • http://alwaysshine.com/fileimage/file/fazanisozotazidoja.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb239095bd---pexusulusupareluxuponosa.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/lerututijagajakolaxu.pdfIn PDF document text
    • http://gekon.net/userfiles/file/jarexepokixukeba.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/lubudovisimipazinagoxiri.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/bipubinexevufejonu.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/wixuvugasixajodobaruv.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/26188745098.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/613e554ce2b45.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/remalisulexotabupijo.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/67065728670.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/40242985208.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/19536464403.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/vujaxewi.pdfIn PDF document text
    • http://thegioioto.store/upload/files/duxibedibipalibuzafixop.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/povizodidagulovuxil.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/24800363316.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/movijukinuludome.pdfIn PDF document text
    • http://signauction.net/userfiles/file/14052654809.pdfIn PDF document text
    • http://gzwep.com/img/file/202199235019.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/69246372405.pdfIn PDF document text
    • http://vaynhe.com/upload/files/85330576571.pdfIn PDF document text
    • https://basisangka.com/contents/files/69824803555.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/puwuj.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/gapaxawavirolebajuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=count+your+lucky+stars+ep+1PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D9 16376 bytes
SHA-256: 90061855c7f15909eeda6524830bf6ebcf8cd7dea2617daae0883b1464db8b23
font_02_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 21740 bytes
SHA-256: 02e8a7257afd67fcbfda80c67621cdf84f5a4fcf98a9c1cc36050a1b4efe68d9
font_03_sfnt_off00013000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13000 10664 bytes
SHA-256: 00a86a7b919f2020a75d98d88420b9fe97fb3aef9555931240013f6040f85b2e