Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a5b48389f637ad…

MALICIOUS

PDF

79.9 KB Created: 2021-09-12 05:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c782426c7a425c582172b3f1284ad3cb SHA-1: 991a4bb171cdb00747eb0c10c4a94f1c1bf77e64 SHA-256: 65a5b48389f637adaa9b19393376f72b4ec392720f1fe40ae104907fac307a0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to host or distribute malicious links.

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://queure.ru/uplcv?utm_term=after+we+collided+full+movie+for+free+online PDF link annotation
    • https://grootformaatspandoeken.nl/userfiles/file/16007534041.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/35643419494.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/xaxevijusomosevetata.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/11085151636.pdfIn PDF document text
    • http://ativn.com/upload/file/garidajederux.pdfIn PDF document text
    • http://ipceurope.be/assets/file/kapemak.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/86578995470.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/xidivaraj.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/98444369625.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/65877311407.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/96413055262.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/53759678756.pdfIn PDF document text
    • http://imi.vc/upload/files/kawisewiwego.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/rekerisuminid.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/runulofukimixigakaf.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/18895796640.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/ganajewisaremojosejomoza.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/13924217334.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/58001796134.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/5989690396.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/xinifiberupodoruni.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/ravuzerojiwesijubekinad.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/zajixavo.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_off0000d5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AB 17188 bytes
SHA-256: 9fa6b98820e89fb31f2a340bab921daa963501dca89c8b3064bd7be1f83837fd
font_01_sfnt_off000101a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A1 10540 bytes
SHA-256: 7501f441026175d26099887e28292c680d061d430f67f83b89a9400cc55700d3
font_02_sfnt_off000119b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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