Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f40bbdeef5d0d6…

MALICIOUS

PDF

91.2 KB Created: 2021-08-23 20:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b31f43c328e77144096fb7566c1c329d SHA-1: 9ce7b25c8b05ca5ece7a5d00eac61646c68e243d SHA-256: 60f40bbdeef5d0d62a961fa7f216c695163eba9fc2547244b890e14d4d84518f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/uplcv?utm_term=in+dc+track+electrification+system+operating+voltage+is+mcq PDF link annotation
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c0cffnb3arpr3nrff6qjdd9kf1/55761414679.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/62808785681.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/samiwetiseregulilemi.pdfIn PDF document text
    • http://naucseto.cz/storage/40380192506.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ee63f524da2---mapopopotutetolid.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/55600408121.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8beaaf1209---49087484223.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/95715451110.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/98420046092.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/foximelobek.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4fae90aa3481dfad4bef3d564d86bed6/83152410013.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/32135538398.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762dd062c00---juwetufasiza.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0c1cf94cc8adbd3516a88df8fd7f2a95/bubiguvesivinuluxo.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/3378267188.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/96077005104.pdfIn PDF document text
    • http://gtshotel.it/images/file/88501537983.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/gubozad.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/63248564107.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/fenagadorugefetupu.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/91625119322.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870037e5637---wudokavidexugebid.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/64231723731.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_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 16644 bytes
SHA-256: 248b4fd346481fdac231b9c9d6c505a37a67e63c1556a07ef4e4a3ca8125cb00
font_01_sfnt_off00012c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001441f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441F 11332 bytes
SHA-256: 280d466071501b08e8e4eaf2360326cc24839feeba1b34a34856774a30dbbb7e

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