Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab333a1be6f4ccb…

MALICIOUS

PDF

68.7 KB Created: 2021-09-20 15:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e0bf550aef25184b0b206bee095dc1a SHA-1: 9649a9b7a1945ff4b07fe84413474e7fcafec3f4 SHA-256: fab333a1be6f4ccb2df3b67dc49e38fb0814915e0cf77d65344a962e0be781ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing lure, including being image-only with a click-outward action to an external URL. Embedded JavaScript and a high ML classifier score further indicate malicious intent. The primary URL identified, http://poketomecam.com/uploads/files/56300736186.pdf, is likely part of the attack chain, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://poketomecam.com/uploads/files/56300736186.pdf In PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/jalovafilovodimexinowupit.pdfIn PDF document text
    • http://ossokahve.com/upload/file/60327059822.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/delusufexaregimezuwewe.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/pewubosaluregod.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/zonibumetebimivuwulamulik.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/fubewuwulotapakezibibum.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/19739200671.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/maritabad.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/mozal.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/niban.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109041608093186.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614681550f097---dowaxerozamojivinufadazur.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/duzetoxoxutifeme.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fea1283adf---61050808889.pdfIn PDF document text
    • http://espokebar.com/uploads/files/vijogekajaja.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210910192041_o2hv68.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/kegawap.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/25555759016.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/goxunedizezuxawopilusanen.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/powedojivigali.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/90377014421.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/88561911200.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=free+dish+tv+remote+appPDF link annotation
    • 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_off0000b165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB165 14344 bytes
SHA-256: fcc8c3025c84db20b0717c8826d1a51db92db4f27bd94d94d140450d6307e7b3
font_01_sfnt_off0000d54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 10548 bytes
SHA-256: aee2ba37fe52f265b12cb17a4c436bf51f87c3cf85d099f693fd3599bae78b19