Malicious PDF — malware analysis report

Static analysis result for SHA-256 00009ac72221d61b…

MALICIOUS

PDF

87.0 KB Created: 2021-09-04 00:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 458f29d22940451021e0a5e5609dc1cd SHA-1: 580647260e66c73ac030a42d8b70a616940cb667 SHA-256: 00009ac72221d61b91b6154771e3fe834ac93f7885ea54bc1e1838ee2cafed71
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b201af3414---73126921267.pdf In PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/p8up995v7rrtrecq5df7ub17e7/14132573938.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/mhudljijc4ki0gkatv64q1m9tg/kejezoma.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/70201305548.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/33583231892.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2afb804a15---lomivirudobuvusujepiwebu.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4736a23ea---xopomek.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941693c2a8a---toxidakofiwuzoroxisigo.pdfIn PDF document text
    • http://lawngo.net/fckfiles/xijazi.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/sixalujijoti.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/rosotanubobidazofapajosa.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/89024088478.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608045af9ddc6---55166477673.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/6633933569.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/furofifi.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/mugdcdfv0hqeorlep1s7m2eo2p/pijutav.pdfIn PDF document text
    • http://oodow.cn/upload/file/210628140407270026s2rkdi4rzz4x.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/0bf290bd9978da32ee6d21511c9c68bb/86180254773.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/jefodu.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/rafopidopiwefewowiru.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/julokuvedavesowuxoxuru.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b65406779c---ninewikapukubunedodesawof.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee58e0e1219---26351555343.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ai9k1l8uu0mpmvi5lp7mq1aca8/jetorisitujovajidateva.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/586489ddbd5177e17794c3b45a39c56b/84808882184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=definition+worksheets+activitiesPDF 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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 10632 bytes
SHA-256: 811f79334a29d51659171a0ebe9489e1e36e4d6409a5b0eb05f3e4966a936ec4
font_02_sfnt_off0001219a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219A 17268 bytes
SHA-256: 8ee73b0f4b554a3533fd137735b9af340702dbf34d4c76a9015d3f52b1c0e016