Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52977e8d8028d75…

MALICIOUS

PDF

69.8 KB Created: 2021-09-30 11:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b4f6e3111849ed485687ebb0e93f0d2b SHA-1: dabd9ba43b435f99507e34502f5c77cc92842974 SHA-256: d52977e8d8028d75a8dae889c4a64cd4a0ded81e905cc3851b08902cb3b1ff57
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, including one pointing to 'garglob.ru', which likely serves as a redirector to malicious content or phishing pages. The PDF structure and the presence of external URIs suggest it's part of a phishing or malware distribution campaign, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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=honkai+impact+3rd+android+controller+support PDF link annotation
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/weroditojipuwusowuv.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/guwugogubuv.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/derozisifivesovulig.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/97945162729.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/xaxasokojif.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/98155053730.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/xuzof.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/lamirapekaxinirabisepik.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/37049529636.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/jodaxodibod.pdfIn PDF document text
    • https://bloomeng.com/uploads/69389242961.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/sarulokovuberejabozaj.pdfIn PDF document text
    • http://ativn.com/upload/file/nizeroxa.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/sesufapeminosuz.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/leginufirunenovasegabumo.pdfIn PDF document text
    • http://baove24h.org/upload/files/42619905062.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/82253924183.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16150fee2e2b66---waseki.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/34922360577.pdfIn PDF document text
    • https://edgecs.com/documents/tugolakalowilibitadofa.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/wegereribasipafukatofe.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/rusuninezezamazugemo.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/2671574184.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/tojubasexelovewavazosar.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210930_154357.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/47274841648.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_off0000b174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98B 11028 bytes
SHA-256: 681172db45e9b5298dceccf1181e06119d1490238e54cb10dde52ec3b097f352
font_02_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 15212 bytes
SHA-256: e068a03769086c869ab657526f872c9f376052746b3af85d16f47111b552f87d