Malicious PDF — malware analysis report

Static analysis result for SHA-256 16119f99c5f68b1f…

MALICIOUS

PDF

83.5 KB Created: 2021-08-29 11:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 167e6b71cc9d9513487b0cb4c98f6829 SHA-1: 2d3f0289ac9e229c1f7a278b8588fb09f369954d SHA-256: 16119f99c5f68b1f05b6ed62204fe867bfbe9295af1533d62fa4df2996218176
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/uplcv?utm_term=gas+delivery+near+me PDF link annotation
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6b8b77f98---xitanixavixiri.pdfIn PDF document text
    • http://rinsacars.com/files/others/57327287699.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2db0247a814990c3ee731d1df42cbb85/44377573861.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a01b04329a2---92090266218.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/r09uaiffsod94nobq97pv20t4t/xugalifiguxag.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/12401076204.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/83527730557.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/55179848752.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/29262014840.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/6212a57adcaafa104f09d37b74f4e07b/47661834689.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8b03b0b2c7fea4488fa36a1b29838584/51237260025.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/baa2b53f147757c267fbb5c40ba4e065/vevurozojumalagezusabaki.pdfIn PDF document text
    • http://ballard1966.com/clients/22636/File/41364302303.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/24843389889.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/37194970217.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/12633676109.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/jufixatejoratek.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/46073273045.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/4455491050.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/2462318a17469c8188a29713c9f5a590/boxugafezeduf.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/fojeles.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/nalerolotekijagik.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e6a549182---18876115738.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 10412 bytes
SHA-256: d464716e6842f343d3482ef40bdb0ad7658ec256fd1cbd668204b2e5b93c15b4
font_01_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 17356 bytes
SHA-256: 1869106cd397cdb5d604c36c23ac428887c228524acafecce3cdc7f02df9be1f
font_02_sfnt_off000127bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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