Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fbf2cbe2478ce9…

MALICIOUS

PDF

197.7 KB Created: 2021-08-01 19:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 493bf42d16b9a05c2368c4bfbb4a3d9d SHA-1: 581224e1bf5c3d99dba8dfb14928d1bfe81ac2f8 SHA-256: 57fbf2cbe2478ce94f46e27e8cdd25e9b80030b57e651e829da7d620b2b38ac6
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

This PDF document impersonates Microsoft, using urgency lures to trick users into clicking a link. The link directs to a domain unrelated to Microsoft, indicating a credential phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of embedded JavaScript to facilitate the phishing workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://crewmak.ru/uplcv?utm_term=the+binding+of+isaac+flash+game+unblocked.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=the+binding+of+isaac+flash+game+unblocked PDF link annotation
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/080057fea343d1f7b8154200171a79b4/59315967743.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/xorure.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/33474017055.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/xisumu.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6545b5a809---42220253682.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/lomovuk.pdfIn PDF document text
    • https://hoalavender.net/upload/files/13303936358.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/40462450595.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/ja1sj0d5tp4bg3clufmujubrr1/24674227103.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mkkf1hmdr7d99ersbj5ijt97rs/52210267347.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/72046775531.pdfIn PDF document text
    • https://ccskin.com/geektic/files/barazerolafigegozajajapi.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/kefetukokunetijaw.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/58170133227.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/92fdf60d29792e45efacda3d187f0875/naradoputilifejovenuwub.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/rukidofifiwolefirovevof.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/pofesufaritumu.pdfIn PDF document text
    • http://nusamulticentralestari.com/Uploads/userfiles/files/tulusasamivoj.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608052d5270eb---fafamot.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/xobupanexepixikoduza.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16071c5eee31e6---38398058837.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/404edfc5347b75c91a8f439131bd4cb0/46967474748.pdfIn PDF document text
    • http://greece-ex.com/21503348664.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087bdc37e69b---59737792945.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_off0002a654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A654 11020 bytes
SHA-256: e56d33f540e1dd31b529e95de49c06038eec2a25c8495a4b720a87bc7228560b
font_01_sfnt_off0002bf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF81 18544 bytes
SHA-256: 7b09e9542786986172d57864dc616b80d0d838bd060b352cf105d5b318a462dc
font_02_sfnt_off0002f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1