Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2d7276246ba745…

MALICIOUS

PDF

75.3 KB Created: 2021-09-16 20:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 25e746d38cf1ff48da597c927d182a78 SHA-1: 9501d85c9d32236c1135df9e8dc502e7ea52c4dc SHA-256: fa2d7276246ba74532d65791f36a15ff9d2688b5db668e070ea8dad7b5d3e86d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=run+3+io+unblocked PDF link annotation
    • https://sandipkumardutta.com/ckfinder/userfiles/files/vusamagidaxofe.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/15059453961.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b8c7a1160---mofoj.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161362cf1b54ba---dawavefaz.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/6ac21ffb96f7aa9111166ff6440772e0/21644783755.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/36045886757.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/50035049858.pdfIn PDF document text
    • https://defi128.com/userfiles/files/totufubazawinoruxitisid.pdfIn PDF document text
    • https://securitydm.com/slicice/file/11608240984.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/91471244764.pdfIn PDF document text
    • http://charontrade.hu/data/file/69656388370.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/mibasimubewikakoxewevos.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/19945678976.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/ripuji.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/64054510693.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/65410886133.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/35830772462.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/mugitizitilewefuluviforig.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/pijigamatibugesezem.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/nesoduze.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/92177994942.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109072028344587.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6e45ef345---bewimarukofovawe.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/95979721778.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/99801614280.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69292090117.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/ginitet.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_off0000c5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D5 10384 bytes
SHA-256: 34c85b3c91859425f1aa936501741c23af2e4704092e6a4bb64de7637317c103
font_01_sfnt_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 16268 bytes
SHA-256: 8fa7e4879328e9c0a42adc5443698c977dfa0b08f95aeef8ed6416f8c4fd30e1

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