Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5bf7a75005a024…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 08:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b252240fb9a4ea8acbc4819d05ab65d2 SHA-1: 335c7bb2c679673b54b34c6d91da5012a8c89862 SHA-256: 4f5bf7a75005a0249f05e563138ace957881d79f734979805956d68ea1f025f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links, including one pointing to 'smidgel.ru' with a query parameter suggesting a Photoshop download with a crack. This indicates a phishing or social engineering attempt to trick users into downloading malicious software disguised as legitimate software. The presence of numerous links on compromised or disposable hosting further supports this. No scripts were extracted, but the overall structure and URL targets are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=photoshop+32+bit+download+with+crack PDF link annotation
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134ade68d2aa---31404239223.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/dotifuvo.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/gakovuj.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/megarumu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161368e256622a---detozesik.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/37720105372.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/39210607645.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/67516149535.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/94669963363.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/fobat.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/xatuwidovufatuxizowof.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/79333600938.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/lafiditudasidom.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/fidenusisibabunemupi.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/watiwutoxusodu.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/70506083782.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/14714658476142a9065f919.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/vupubazebokejawisok.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/rorirarutigamedokaj.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/42191318582.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/zejurajiluwolana.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/36108854654.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/moloxerijarinetit.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428b4cb7c6c---15536680073.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/kuwalukapivosawisag.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/28705881128.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_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 11092 bytes
SHA-256: 5f2f1f31a012566ac7ddd37b7510b1ccd80dc8b63b0de233ac462cfa73f80610
font_01_sfnt_off0000f65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6F 17640 bytes
SHA-256: 6e0ddc1230d12732eef73392c6ede89f687d3dc3cc26c50ab53870c9c2907542

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