Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88f68fdbf89be8b…

MALICIOUS

PDF

380.3 KB Created: 2021-08-01 15:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: cc86ea394a0b1fd0d5bde97c9bb2b243 SHA-1: 28957ebc5574e3a1224a65bbbae99b74aa5188c0 SHA-256: a88f68fdbf89be8b3e9589326f9f0470ef0ab93d55d7f15e408c81f2760a3f73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload storage locations, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8966

Heuristics 5

  • 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.
  • 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 http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/9abadb038dbb791a3baf7620104dad46/56849426718.pdf In PDF document text
    • http://chiaranannini.com/userfiles/files/wenilitabotuja.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/c3cd02a8c5e3bddca995729f6f56a036/lututaro.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074574c7e3ac---worakerowilonovekitotir.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/62059486327.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b21a26390---97359520256.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a001a03edce---28751227117.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/68739028692.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609c150db5d46---zuzeme.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba655dd75a---nezivedopeb.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/relofanabemabuwugo.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/52489885514.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/49881770123.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/gatinodukizevozupalux.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/e65o543vi8ai5jrhk7iniea2s7/27002776233.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/fe97bde6255108909c509118963ebd09/50258770210.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/nomaduzikexideximafux.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/sidavobedizudapadale.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/644de1559e82fa2268c7f4957db4ab05/rivawemava.pdfIn PDF document text
    • http://e-hane.com/files/45297151543.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/4a53172029d0dbfd42b643538501d276/5304405130.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8c0625d6567b77561a7eed056e6b2d1b/japafurofazexeligagapo.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/jegiguzitararot.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4f7055912637d38a39b38f395d3e4a6d/64586849996.pdfIn PDF document text
    • http://akademibt.com/resimler/files/91017911749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=2.11.5+line+of+increasing+blocks+answersPDF 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_off00057d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D23 18784 bytes
SHA-256: 5083e54f38888209e8140aae1fbb3f8c2069b70f08e17940b2e027c2fc7a57dc
font_01_sfnt_off0005af54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0005c76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76B 11008 bytes
SHA-256: 150dce59763332ecc05554aa9a7349b73f7a59ed1c323c9efb8f88287a1f3c8f

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