Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d90fba8b21b56fa…

MALICIOUS

PDF

95.8 KB Created: 2021-09-03 19:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 97ceac430963446baf2a3859d9b49782 SHA-1: 22c5a36575a47ea2c43e7e0a30316a98c04cabc2 SHA-256: 0d90fba8b21b56fa04da279ec7f7d91d1661d0d1f655aec6aa50265650cdf587
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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://pixomot.ru/uplcv?utm_term=c%E1%BA%AFt+v%C3%A0+gh%C3%A9p+file+pdf+online PDF link annotation
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160797e4f24cf1---23120042299.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/newusevupurosafumemizaso.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/basiwusefujes.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/98240874078.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/9576137201.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/37003689897.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce5390ba87---59820171504.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/75471441142.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/lipulitap.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fede3b00d---fulaxuzuzajew.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/fezeduvope.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/ponojevikukofolupufon.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/wovalabivava.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/wakofamazotenutatobujolid.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/ribinivivobomudiw.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726acd1e2ee---gavegirizinasam.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/1857711161.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/96893009055.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/47144033231.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b181e4188e---bewopize.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/dodumaxixajen.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611d69c9a1758---85094514883.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-08-04/images/files/27755740956.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/sexutikepaler.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 23312 bytes
SHA-256: 78b2f5a0231a56c940a4445051942b652562fd8b32ce75efb45eefcd31adeeb6
font_02_sfnt_off000137e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 11016 bytes
SHA-256: 530faa80e4915ff001fd368ea788bdc2a69689090ff0b5a5ed57aae3443315e1
font_03_sfnt_off00015096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15096 16276 bytes
SHA-256: abf95fb62c40432fd760fa620ff9f295d6b22296a3082f5d0a8e25644338e0e9
font_04_sfnt_off00016656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16656 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c

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