Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ce29464dda5aec…

MALICIOUS

PDF

80.4 KB Created: 2021-08-14 00:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 97d222076357baf449cd672e6163394d SHA-1: 60b2024ce45cc169ad6e68e85e56c0edf23bc152 SHA-256: 63ce29464dda5aecb209e0e4dbf2528641334b7839381d6f49868ddc3e6c24c5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading further malicious content. The document body is heavily obfuscated and contains no readable text, indicating its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/rf7uruvg23llb85k7355goafgq/85510818791.pdf In PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/9e13cd6d7125125cd30b812f0007a31a/vebudomi.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160948214ec49a---68249854037.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/faroduge.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/52ptkufldr08bkheknp0q111so/40085352733.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a114fa44b0a---13608718039.pdfIn PDF document text
    • http://petrduchek.com/files/32732947050.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/bizuk.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/zixeduwosatarukumune.pdfIn PDF document text
    • https://cian.hr/userfiles/file/vevetozunaxexub.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/gadijulokerobivitu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a75318ee11---90416399616.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/e2de247f5961a0e16dd7a3dd5fec9b63/91076128216.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ded55b169a5---7646891970.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/21346466869.pdfIn PDF document text
    • https://vestol.bg/files/file/30687559613.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/posijuzoguzitibitufodu.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/47795018671.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/todewemedewivifi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728a2a36d5a---8943654662.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/99638034504.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/ralulinosafonevokivuj.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0041915e7---38297269862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=joy+of+creation+download+apkPDF 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_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 17312 bytes
SHA-256: cfbcd390b4f9068327a713b577ef4ecbb0e1c4668f24cb316933c5c58f7d425e
font_01_sfnt_off0001012b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 10728 bytes
SHA-256: a802bc806fdbf1d725af914bd0406020b45ce7a36875be9d086a2be538f284cd
font_02_sfnt_off00011a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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