Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ee8507f650bb58…

MALICIOUS

PDF

84.8 KB Created: 2021-09-21 00:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 649e5e880b0f72d8eeb508783c0584cc SHA-1: 937a23fca361a8f8c646c3d9f39622e3966e7bdd SHA-256: d2ee8507f650bb5841f1ae483ae2eb791d339e1a149fec8187c87c218c468ef8
134 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. The presence of numerous links, many pointing to distinct hosts, combined with heuristic findings like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'SE_URGENCY_LURE', suggests a phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wabasnb.com/files/fckeditor/file/10084751906131b49049a67.pdf In PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/fagenamo.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210912_92A82CB94CFDCBC5.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/1660039979.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/e95e1eeb3dc39bfd0d8b3a4fdc574196/18782647630.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/jigiguwutexizapeke.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/wixipevemoximokujerumox.pdfIn PDF document text
    • http://elma1.ru/!upload/files/nusawufopazepesok.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/27242461659.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/lufonagokobig.pdfIn PDF document text
    • http://snft.ro/media/file/42179968439.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/92016964334.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/jatamowami.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/paxate.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/sojuwagikakemo.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/6940899002.pdfIn PDF document text
    • http://lejuriste.ru/files/file/ralez.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/20152716643.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/96813225479.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bs4eefsmkm9fp7vgg07r8jq786/zafijesuponamodufowudaf.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/50467783376.pdfIn PDF document text
    • http://ned.ru/uploads/files/bixirojewojasibufona.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/zelixizekusijopewatuxipef.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/gejufabetubidovutoli.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/56733096656.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/korawuzipagiwepetifexota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=keyword+tool+affiliate+programPDF 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_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 17420 bytes
SHA-256: e8b169909b939587304b76de64f87ca2be0d50b013da118e132e48d15dedb2c9
font_02_sfnt_off00012d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D64 10760 bytes
SHA-256: 8fc3fbb4544fff4660613fc2a87f0d84f38cb49a9e51ed9721e9dca98b87cfe0