Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2d1e5ae99a5eb1…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 04:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 032051f12b56fd26998285ffd2167d48 SHA-1: c9a06a93a45b6433ad8f9d4e671fe07eeb1ceab8 SHA-256: 9a2d1e5ae99a5eb10ecc6f8537742307cdd3e187f3b1d63a9cfc221410d7cdd7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://philabc.ru/uplcv?utm_term=hay+day+mod+apk+latest+version+2020 PDF link annotation
    • http://pokemom2.com/uploads/files/9785114221.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/luxepe.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/luwiwixejinugejofujew.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021091121529_574853909.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/sumomulebukonewemalem.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/80911663699.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/96105478029.pdfIn PDF document text
    • http://robedecreateur.com/img/files/79253260595.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e931a9142d---40494177398.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/vofobijimijamoxuzoju.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a1dbaaed2---putubidanujamudid.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/93945992932.pdfIn PDF document text
    • https://italvaping.com/file/paziwujeturi.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/81475481598.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/mabosogovemujowixowet.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/niralanimapegeper.pdfIn PDF document text
    • https://seikai.jp/free_images/files/82068998337.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/wirunamofevibob.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/0p26k044gmp28i3mnatrs92hau/29595131356.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/dokoxotanonat.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/kegexuzibapepi.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/numagubetutolametalivel.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138bd12b79c4---86254457032.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///43518930997.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/4277797991.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/nuxusilub.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_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 11060 bytes
SHA-256: 4e62020c9dd0b303a2749f3ceb556bdfbd10119b3cf6a0e0355e3b9b2be69094
font_01_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 16268 bytes
SHA-256: 415b137136dc3312a8469059203e3dc6b13695938af235511430e53497998952
font_02_sfnt_off00011c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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