Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc09f06cb8d6452…

MALICIOUS

PDF

69.8 KB Created: 2021-09-08 15:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 310e059c070442dbc9b260d3aa90ba54 SHA-1: cf4261a8acef75afbcdd0eafb4efa1cae2381e23 SHA-256: dbc09f06cb8d6452f342440868300fb7355120d60bcdeab39da41539260ba292
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=american+academy+of+orthopedic+manual+physical+therapist PDF link annotation
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/44436385786.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/ligasewenofidisew.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/fegejukizakekavulu.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/fenenen.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/semesubepanukilabu.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/19805698886.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/rinolotidujid.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/fudemoziwudesadiginoz.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/39184620891.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/mapuleruborazesabu.pdfIn PDF document text
    • https://majubesar.info/contents/files/waradiduxe.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/73968633168.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/vegis.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/76151211167.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/tuzavenuwuwowonurifiguxeb.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/xifitajutob.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/bajexosaxogewodo.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/46055339907.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613129385465f---rovemaluzamasamotovogaf.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/sepuzivunobizidotuv.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/61593217505.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/83348859610.pdfIn PDF document text
    • https://badrivishal.com/media/befavab.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_off0000b2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0F 14536 bytes
SHA-256: 42de6cdbdabfac43c6f67efe9a54d24b1c9e6fcac465ef75834ab1395724f1c9
font_02_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 11080 bytes
SHA-256: d8f4248dbf22ca25eb8c598907dcc6530b10944c23afb38a1dc14c09020a328d

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