Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a77381627ce3c7…

MALICIOUS

PDF

70.6 KB Created: 2021-09-27 17:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e823d825625b40d6dd9c256b9e2fb9c3 SHA-1: 0389ff3caf01712b6d844310d813f5e3274a9e19 SHA-256: 95a77381627ce3c7fe271b22dd3216b19b62c3cd10cdfa792fa80b3c155340be
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'garglob.ru' with a 'gta v for android' query, suggests a lure for potentially unwanted or malicious downloads. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting, designed to distribute links to other potentially malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gta+v+for+android+highly+compressed PDF link annotation
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/nawosetilokixu.pdfIn PDF document text
    • http://perksys.com/userfiles/file/dizisokanovolonibabakono.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/57346516444.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/liserejunow.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/78728395183.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/zoravotigubarudutevaka.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/tunesorabipapojexonuzejek.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613199c2e8508---72939523428.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/gekejefolakikebovok.pdfIn PDF document text
    • http://evola.it/userfiles/files/76542674981.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/3453288558.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/90240628591.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/58437537798.pdfIn PDF document text
    • https://kuepancong.com/contents/files/90284712318.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/18193247605.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/95205511687.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-23/images/files/pusawimumezefe.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/gidewupukoxumesova.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/misusovofapara.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/42955247756.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/bifiviputaxal.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/wufuvagizumokisewasibeja.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/zomaluzipojuweputidobe.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f01c0ab056---vomepegos.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_off0000b0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BF 11284 bytes
SHA-256: bb68203e543b20941c9cde808c3e7c77ad4855f103e1c331f34270f54df55e19
font_01_sfnt_off0000cae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE6 16236 bytes
SHA-256: b8014d9ed778a9a0f11ac4b927bafa1a80a76531998774c107f458d1fb931fee
font_02_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1