Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bffa9b8db297f1…

MALICIOUS

PDF

73.2 KB Created: 2021-09-06 05:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1bc927c5043bc981fa9864b1fe73bfbe SHA-1: 1f3f6a74d118ac66e27d29348ab71d1032efe060 SHA-256: 69bffa9b8db297f173489ca0e6037a0f0b5f0cac28a45d7ac7f175007320282e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms points to an attempt to exploit user trust by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • 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=fundamentals+of+astrodynamics+and+applications+4th+edition+pdf PDF link annotation
    • https://pergamine.com/ckfinder/userfiles/files/71358414265.pdfIn PDF document text
    • http://beta-rc.com/upload/files/zaraterilofeguvunagunope.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/if7irt07dmjuii8j2a7u0lg8sg/fexewezobunulenuxefip.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/75745067960.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/rubizutugoz.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5a048d06---78385637271.pdfIn PDF document text
    • http://ipceurope.com/assets/file/bijoj.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a11bf315c3afcc304f4bf80350778a74/86212413106.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/zolofojusuwijivi.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/20903070602.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f5493156bc3101fd09db1c4217bd1934/gukulabaduwomirexipix.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160855fe592c56---40530497715.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ba63d4da2a7---xakenogazuzis.pdfIn PDF document text
    • http://hongdacable.com/d/files/13112725551.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/lukolonubulezegonusiz.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070a5b4b9368---nebodubenotexusen.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ul27bcm8bmlsuh91bguv2k1elv/73034225002.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/simepikekazokijuliw.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc705da8225---3288217304.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/48532559775.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/lexotamu.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/kezitosijapanusuxupinazi.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa1044e21---zujiwonasafukepa.pdfIn PDF document text
    • https://nicosiacaffe.it/file/nimowufamikebibirizoxod.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610c11b290d56---zufodub.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_off0000bcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB2 11152 bytes
SHA-256: ba362dc2fb2024f09124192cbebc70d8d9f17bed68973f537ecf6979b29e6b86
font_01_sfnt_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 15912 bytes
SHA-256: ed1afcb12ed8a513d7c31360f02c708b0476962a2899dbe3dd9e0de64306c85b
font_02_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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