Malicious PDF — malware analysis report

Static analysis result for SHA-256 a762706beacb04e9…

MALICIOUS

PDF

80.5 KB Created: 2021-09-15 22:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c5532900650e46721e7549c8a05879f SHA-1: b27ce82dc15fc1e1c40ed36ef0e9b6ae212d867f SHA-256: a762706beacb04e99cdf9448596c3aca2ea87fe71358771bdd85078237cf39a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pistant.ru/uplcv?utm_term=pete%27s+dragon+streaming PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec92e8afd5---49583599794.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/19845739873.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/fojej.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6e79c4255---sedajebig.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/zewibixemoxakebijevud.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ddf55b437b14b84fdc9bf210d1aa3849/57804892453.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f64e185ea---68205429829.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/1673723622.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/27d8c27f9c95b6248f8ca4adf90c4e5c/42739686853.pdfIn PDF document text
    • http://abc-tel.ru/data/File/8541260726.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/lewaruzev.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/fowofoxi.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/88293046424.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b925d825---gidipazipezogoz.pdfIn PDF document text
    • http://fabtur.ru/upload/files/solewugufitaviwo.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/66272539163.pdfIn PDF document text
    • http://tnhmc.com/userfiles/file/96524133309.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/20692578332.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/muzavosu.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/guwupewe.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/ralunirile.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/dowopamifawetomowima.pdfIn PDF document text
    • https://ekransamara.ru/files/davugikuseserug.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/bokoridezuxasevugamo.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_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 18512 bytes
SHA-256: 5fe79f12c46d2574122c22c17d42908756fc9e6e949d98a89d46b18a943dee28
font_01_sfnt_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 10580 bytes
SHA-256: 86af87146bcdd9d926a8565dd00e565f96fc88a9d9c82809c7e011e829972819
font_02_sfnt_off00011cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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