Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee2d0645d1bbd3f…

MALICIOUS

PDF

90.7 KB Created: 2021-07-15 20:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f7a8ba581b5a641e40fb30e12d03fe2e SHA-1: e58045c34ecf3dc8592658432ba8fce8492b0976 SHA-256: aee2d0645d1bbd3f0c79e270e1569d6eba7bd1943ef35aa4488249320f0c1106
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and embedded URLs are consistent with a tactic to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/d60677799f8d0e95b68dbce956473229/6127693218.pdf In PDF document text
    • http://ahkjt.com/upfile/file/jujujipovejedo.pdfIn PDF document text
    • http://70sromans.com/clients/871711/File/vaken.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/75717292071.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/95969872953.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/98797609329.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/24b92be43d9b686b2622ef98426f5c24/rufimogege.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/pisidazepepaxerip.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/60007973484.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/sisotegelonekuzapatalete.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/66224762447.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ab67b2070---vedetexenasibefuxovure.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/50556690644.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/abf726be1cec371ff913d2c230edc53c/gawopegikozujuviwuneloxuf.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/384efe83b6cefe2a1197425a17e9d258/56931317964.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/65929635973.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/74369545971.pdfIn PDF document text
    • http://billcolletterealtor.com/clients/e/ef/efe7172bdc9c6addedf700543cb5cb37/File/97701390126.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/34165712913.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/090fad3559ebd11070477efc779145f3/pagapoferudofu.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/kakalo.pdfIn PDF document text
    • http://www.celso.org/download/zelupetexuvijovazemareme.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975b48604e0---xipapif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=business+analysis+and+intelligencePDF 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_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 17444 bytes
SHA-256: 7359ed620a480b995f1906a494a9e83f97086aca19728980dc340ab4ace9086b
font_01_sfnt_off00012cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 10592 bytes
SHA-256: 602332ce16a96e5d6d1c1586cc654688f98904daa07cf7f20b6b33e60f8c3454
font_02_sfnt_off0001451a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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