Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9214b55df737e06…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 08:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a72989c3f575cf1b376acb02c9a4e44f SHA-1: ca98dbeedcd17d9d0697785b2e443a063400bd0a SHA-256: e9214b55df737e06de161855170182fe528c691379b0e197a646120dd9d07cc7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=download+ac+market+for+pc PDF link annotation
    • http://huile-de-nigelle.info/userfiles/file/josopetutoxikoxu.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/gexipagoriv.pdfIn PDF document text
    • https://wineart.online/userfiles/file/38707230151.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/pofojurafoxediku.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/55433676654.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/98099217698.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/zeridifuxarat.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614360faac21d---kuneditek.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/biromepowokuwesotosaro.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/bajotawaxabokarij.pdfIn PDF document text
    • http://salespate.com/userfiles/file/megoj.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16359885455.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/jerumaperusax.pdfIn PDF document text
    • http://hangquangauto.com/files/23017047966.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/renamukabomepa.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/jaxukemexuwawivipebaxe.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/18285991729.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/nuguvo.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/37456554198.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/46795706408.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/6370188362.pdfIn PDF document text
    • http://hkwwta.org/userfiles/89438025124.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/ganaz.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_off0000d3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C4 18392 bytes
SHA-256: eff34977ff8a3b925b1a237789e047c8605339c91ef9a83f096cfc7357478c5e
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 10700 bytes
SHA-256: efff124da4bfdd792a043f09e464b7112b8343120cb06cdc6814a23d52567e76
font_02_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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