Malicious PDF — malware analysis report

Static analysis result for SHA-256 82514397c89a8b2d…

MALICIOUS

PDF

80.4 KB Created: 2021-09-12 10:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f3a01b66457ba71cc9d39a37d85e9c6a SHA-1: 577c66685a4ef3f98d639a7bb3138fa29ba128ec SHA-256: 82514397c89a8b2d8bfcc55c14b05a21bb29003fba5ee08daa211876bf0cb54b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, highlighting the use of numerous distinct hosts with minimal links each.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://gplacestracker.com/userfiles/file/85883235580.pdf In PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/tiwofinapaputilus.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/88201998210.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/87565458621.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/nupexaravim.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/31164171703.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/lijeri.pdfIn PDF document text
    • https://ebooksweb.net/files/file/65105707589.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/potiwijunu.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/28069375673.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/88914763403.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/woliwofutit.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/71769087081.pdfIn PDF document text
    • http://japhina.com/upload/file/peferegukuwupoz.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/pevim.pdfIn PDF document text
    • https://guijek.com/userfiles/file/xutevofipanalirosimowipo.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/masoxelupawupizep.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/veweperom.pdfIn PDF document text
    • http://houselandia.ru/files/didezadibojifurowemuxeko.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/70808627793.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/80a67398469d3225fd1d3159d10d0375/89966858535.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/97533510544.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133eb26e24a7---7945376746.pdfIn PDF document text
    • http://toroisg.com/public/images/files/72552293754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=news24+tv+channel+malayalamPDF 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_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 18008 bytes
SHA-256: ace5f9a32fa73e2155dc4baa5e989d75cbdbdd1445e13a4e178a084c4d3c522d
font_02_sfnt_off00011c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 10624 bytes
SHA-256: d233f77a0d62ec803b19402a79a51e340b0ae9c871607a6e2e109522e0347efb

Open this report in the interactive analyzer, or submit your own file for analysis.