Malicious PDF — malware analysis report

Static analysis result for SHA-256 490845bd08151dc6…

MALICIOUS

PDF

88.2 KB Created: 2021-07-29 18:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8490b447f63f2f7281abb4db3fe08848 SHA-1: 58bb8244a96aa7d86e160d7be2d11d441a10a59b SHA-256: 490845bd08151dc6dd56ecb8ba53ae5cce32c79c080a335c8ab81fb54c7ad0f1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://fipjp.com/userfiles/file/65382567792.pdf In PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/zelazixane.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pialte6u4qmjor4i57a3dkf7ne/risulijubavumuwaruda.pdfIn PDF document text
    • http://zgic.ru/!upload/files/60831995820.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fff85554fc9---bazeruzopojelutaxomorij.pdfIn PDF document text
    • http://yorkiematch.com/clients/6/65/653dc45b8f6063886304ac4260dbb99c/File/17352270398.pdfIn PDF document text
    • http://tencanpowder.com/d/files/lapubilabakuje.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/50042127236.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/66476691083.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210619_2ECB3B4B357CEF4B.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41f378906d---19876538190.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5fcd82169---fabezerutamogenone.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/69758398881.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/42704676774.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/68874572422.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/38658671905.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/favuselotanudaragaxopumu.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/1eb01b0d8d0d7caae0bbdec23c4a9fba/86007445601.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/fasuxep.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/77321465147.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/9b29be668ab9c0e2d1ea9ab176819620/2718031552.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/52139389344.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/93880266824.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/go1r5klhlg8ibn28kcs446i628/44561025056.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/fijumejafotoxatokijiru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+network+unlock+code+for+samsung+s6PDF 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_off0000f11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 11364 bytes
SHA-256: b9592c27ecf4ee7024711892cc8e5e8d5f13ddda850815b04b3bf3b7d6fa73bc
font_01_sfnt_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 17592 bytes
SHA-256: 54714d5f3626589930afe053222ed3f522138caa9da926a1a8cd788863a7c383
font_02_sfnt_off000139ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1