Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2ff9cd4ee10501…

MALICIOUS

PDF

67.9 KB Created: 2021-09-29 04:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d2d3032d9d76544d9d17ad8f76941968 SHA-1: 223436e72c21913bee02eabb8ed785a7d8d196e4 SHA-256: 9d2ff9cd4ee10501f80d7e7c7d4d0a82a756719e5f1ad403fae098d587a525e8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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://queure.ru/uplcv?utm_term=spin+the+wheel+for+free+robux PDF link annotation
    • http://clinivetmadonnadirosa.eu/userfiles/files/85807862616.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/38834616088.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/48421471439.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/rilozofalusejosoxilazikak.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/rufozereliruzaruwebibef.pdfIn PDF document text
    • http://webbuilders.com/files/file/92281454750.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/11138565194.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/zenibadarufubemivutin.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/wisepufofuxupidaz.pdfIn PDF document text
    • http://glassick.com/userfiles/file/menuzowivugileduwonafunan.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/17843238451.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109040647571865.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/danom.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16136a6332a8ce---12813750493.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/53467206013.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/16369161385.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/202740910561533d09285d7.pdfIn PDF document text
    • http://mylead.mandiricareer.net/contents/files/1520092194.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/pumuvi.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/29493672006.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/90921782422.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/rimeropusawowobisiga.pdfIn PDF document text
    • http://hangquangauto.com/files/89238139204.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_off0000ad7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7B 14440 bytes
SHA-256: 7e27b3ef3b58694067d8d980f8ccc16b2d80b7f90e9d4a166545b4407847d2c9
font_01_sfnt_off0000d1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 10628 bytes
SHA-256: 3fd75cf09e3eb3a10bf756c115b8091ea97099917edf503bb39f836a1e21591c

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