Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d7edc72c376632…

MALICIOUS

PDF

108.6 KB Created: 2021-07-22 19:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f96ac5731a9988c95be17dacabd2e81 SHA-1: af6875ed264b255dd081749217acb6165d796aff SHA-256: b7d7edc72c376632b4e0b64f153b9e208e4f225487f1bbea752a0a385563b8d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs, many of which point to websites hosted on compromised CMS platforms or disposable hosting. This behavior is indicative of a link farm designed to drive traffic or potentially lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/7c31072da998c8b1d25d31c8ddbb0133/xodobu.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a79b9c982b6---litoligikam.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/boguzoxupifir.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/rokirajovubipese.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/mixunefexu.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/66782269310.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/bamavebefoluxoze.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/lafexijeva.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160f7bcbae0a8d---70821590126.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/fekog.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/akd2v40coeo9487u3roiq5nkm5/4010073775.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/70395375459.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096e6b46bf1d---zemotapivepala.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b86adf06175---23519382378.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/fisexekerokew.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/98407033772.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96d29df841---lefizojuveroxalatojomawe.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/50140004799.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ad66d373f01---70943705247.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/59373845644.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d9d6151d19bdf3349090f3e9bf9b4519/44843247720.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/67805878169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=impact+of+internet+on+business+pdfPDF link annotation
    • 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_off0001441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441D 17568 bytes
SHA-256: eb8c357e72e4a1a08c0a66fe74efc1478f8c9cdfd31b8031f699496496d4869d
font_01_sfnt_off000171d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000189ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189EF 10928 bytes
SHA-256: a03f567bfdd6b2b9abd156c719a3d925f36aea37a814d98d3d7a2255ea613bf9

Open this report in the interactive analyzer, or submit your own file for analysis.