Malicious PDF — malware analysis report

Static analysis result for SHA-256 c809dd2bf9bd3f71…

MALICIOUS

PDF

83.1 KB Created: 2021-09-11 23:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eed338c052f98c6f991beac56b138c45 SHA-1: 44d7c859445ac152027a3c2843a30ee5518b8f70 SHA-256: c809dd2bf9bd3f713ff65eed5ec904b80429e86a3ffa6eb372fdf28b9c4198cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links, aligning with phishing and malware distribution tactics.

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 https://garglob.ru/uplcv?utm_term=fidelity+movie+online PDF link annotation
    • http://gapp.fr/medias/files/nasoruzumamaxevokuzegofu.pdfIn PDF document text
    • https://shevian.com/images/file/wawujuke.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/xosixaripozidapiwomafaf.pdfIn PDF document text
    • http://net-work.cz/data/file/wilagitexu.pdfIn PDF document text
    • http://chikatere.com/Upload/files/kalutum.pdfIn PDF document text
    • https://limadelimon.com/images/file/dirijufitup.pdfIn PDF document text
    • http://winso.tw/userfiles/file/21307985591.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/bajejozakup.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95598564128.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613421cb1bea5---7805150157.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/79942805839.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/52249291268.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/jokopegawobej.pdfIn PDF document text
    • http://packamate.com/userfiles/wubilatavaresazanu.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/xamagobupowobudo.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/valodijurekipomibaza.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/33893989164.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/zupolebosijazixepuwu.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/84339996760.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/12268113993.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/99085764956.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/36947310655.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/lozukadolugazaserij.pdfIn PDF document text
    • http://ossokahve.com/upload/file/wejoreguporesozeluwedu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 10136 bytes
SHA-256: 54c43d1f2a7fbaf97f687ef8837a38db4ba00cfedb8198c3e85717c3c4fd215d
font_02_sfnt_off00011154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11154 17592 bytes
SHA-256: 38ca87a5637e468826df0e94854d62e2ab88970a9170ddcb9dff7d44482b00ad

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