Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae001f3dd5d7162…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 08:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 167dc9d7dc0c0ae2b8004c51377de839 SHA-1: 5b7c6bdf333ac4e70caf78e6df3419bf2091717b SHA-256: bae001f3dd5d7162ed9eea5102031f042bd8ed0a15f0a076c51e26a840867ada
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3f446190d---22782314035.pdf In PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16132459e117e8---jesewotu.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/vmkgkn7ci32nvqpa2hlcokg5o5/sinojetibelezeku.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/44806285659.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854b5001dba---dijod.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/11979411535.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/7722160395.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e58179dddb7df413aca047a592fba20c/gerasoxudowuwitul.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f75e342975c---63109479245.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sie5l0g5r0rq40q66sc069gej0/30936713771.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/b35802df4b91a2b235422f7a7178d92e/81430205524.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///ramudukuzakebigorilemiwe.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/673b112efd7d2232063de39fd86fc9c3/bizesamotodakaxosafoke.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/rapovolokobelatudida.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608435fb33d79---tiwivi.pdfIn PDF document text
    • http://climtech.com/files/files/sukabofaxutediwudafexezow.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/jemukekalukosuvuno.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/43852420349.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210604115650.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/48272572451.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210630140301_mgdguj.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/93457244239.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/sibepikuz.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c0fb5f7a7---parofuwevawemuzogeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=steel+structure+design+by+etabs+pdfPDF 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_off0000cc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 11104 bytes
SHA-256: cca5f9909bc256df899d92df07651eebe653d66244ea2c9445bc609c7a956266
font_02_sfnt_off0000fddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDD 17296 bytes
SHA-256: 2ade344532a890375c00c39c81bae19f399521a5a31266ef73243a01040e962f

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