Malicious PDF — malware analysis report

Static analysis result for SHA-256 9848b868d056bd72…

MALICIOUS

PDF

96.3 KB Created: 2021-07-29 19:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a59bbcaba81d3ad5597777a423055890 SHA-1: 2cd6c30710ebfbc50bfce78abb95a5ad73a95b80 SHA-256: 9848b868d056bd725c52db0b1e076cc7b0f0b2b1b4f558fc9be22a7e9a5e7b2e
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://coretry.ru/uplcv?utm_term=give+five+types+of+context+clues+brainly PDF link annotation
    • http://georgekoldun.com/var/upload/file/70612728396.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/42304263045.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/18140754833.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/86278681df82ef01c922b0ea2d4ca994/wizevurunurixivaj.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b765ac69f---vejiruxi.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/87310573382.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/05a7c8531f14e55bf5def4a2771810dc/55180158368.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/dewazetofod.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jjirqu1lfrisqnhgangefvpft1/kokarukuniri.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/zupinoki.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c153f88615d---4110709507.pdfIn PDF document text
    • https://airshow-bg.com/file/88812690739.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/89685221198.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4qfqsbmkudo4okb9beavvskoof/67310837604.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/40785242549.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8aef4398c01fc1af705b674aeaf86762/tifijunubega.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc29ae79a1---durotobukiwefixinomawege.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/regepiguzezutirasolawolo.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/85738249778.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/kowizutigivafiwebote.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b4fac1717a5bc6829bfa534e6ad629c7/nuboledezovixida.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/zedotixidigowes.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075649bc5997---32867080749.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/dadoroze.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/33431628781.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_off00010adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 11036 bytes
SHA-256: 78ce7d3e04240a764422b4d59d05e299e12a272ff14fea03651971f406e9dc65
font_02_sfnt_off00013c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9F 20324 bytes
SHA-256: 0031d45864907fb919c9d22a3f1b6674072502297c39f48ba68f5f1cf695b53b