Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9fb011e6ebd1d5…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 04:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 877c0ea5bacc533983ddaa0615946768 SHA-1: 6aa56991997a26c0edd7da23315c0e2efb2fbb85 SHA-256: 8b9fb011e6ebd1d58298a001586aa853611f21b12580899d32cf3da4ad196889
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/v4d1mgtave3liur66b5tk2t0s6/fitaluwonezalifot.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609971465dd94---gixixekabiruxul.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/rovowonelidelinamof.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/67f66495cb6b58023c863b5d2b15bc6e/tibixuj.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/99019562835.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/96200404219.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/47454756994.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/fokomaw.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/nidurudotipat.pdfIn PDF document text
    • http://scarpatti.com/files/950957596.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/57368919711.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/bexetipojudeb.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/681126824.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/78828843986.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/sasigojebisonumugole.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/fexuwukugepegajizuvag.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b30b71a36e453e8d98c1a1337de4b641/74239169490.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/kilaligupenakepajosozonol.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/32692546304.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/xawebonojejudo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/qsq0a3k2lo634b5a379bvddh54/xenoliwidovikekufutopod.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/9eab24e5443a677de36f6d6a3b2f9b4f/53059855212.pdfIn PDF document text
    • http://novichiha.ru/pic/file/kebevizamufewalumugewofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=think+vape+sailboat+user+manualPDF 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_off0000d608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 17316 bytes
SHA-256: b2bbc77b827339b2239049ab4788c7291d6e91a3f220f878d3de8cc05566dd31
font_01_sfnt_off000102c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 10876 bytes
SHA-256: 65427670330ce6692f46a46acc20fc1162df873fde35be4ff775a3488176f51c

Open this report in the interactive analyzer, or submit your own file for analysis.