Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0942e81447cee89…

MALICIOUS

PDF

85.8 KB Created: 2021-09-21 07:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e7359f7b3400e8207121a5109e18dffc SHA-1: 459b7491c01966277ebad08849d817911a223503 SHA-256: a0942e81447cee894dfd607be3cc0602bb5391dd0c4e55de1516a03c6dc61cbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to various external URLs, some hosted on compromised CMS platforms. The embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://garglob.ru/uplcv?utm_term=procreate+download+free+for+android PDF link annotation
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/85826531034.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/23084133621.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/33470666991.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/wijatutukox.pdfIn PDF document text
    • http://poliambulatorioargentina.eu/userfiles/files/filukitozivevelalofefejet.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/395178873.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/worogezidu.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614095e812fe2---85410344149.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/35612825069.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/36966125108.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/68605950473.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/vivibojaw.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/49136918052.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/8q67h2kaq3tpc65jphueoft1ga/vegubed.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/fikoj.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/31728270097.pdfIn PDF document text
    • http://chikatere.com/Upload/files/1833567549.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/10296404846.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410977a3552---mijadit.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/2549404443.pdfIn PDF document text
    • http://eternaseguros.net/files/files/tisitabowedevaranusuboxad.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C6 10388 bytes
SHA-256: 8fa4cacf401643dd6c44d97eb7656cc8cd42fd9a06f86fba956b4a960f06256a
font_02_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 17152 bytes
SHA-256: 9fc41767f2d78a3cebe5521413217043f13393c186a76fb4cbd7b9714b0fdd00
font_03_sfnt_off000112e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E2 21120 bytes
SHA-256: cd4ce3305b37972864bd99f2537a4aae6f1f026fcb3d31a7c71ee39eb931687e

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