Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dde39ec774287de…

MALICIOUS

PDF

84.6 KB Created: 2021-08-19 05:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1e088894834c60ee2427bbd2e58eec9c SHA-1: 23fdf1b0ed274320a45ea300a66a886e99314d33 SHA-256: 1dde39ec774287deff5188698337317bdb64696ed29f88eb3f5ce5fa50a3e450
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable hosting, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The file's structure and link farm behavior align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://www.hussco-steel.com/husscofiles/files/fedidepujozopotal.pdf In PDF document text
    • http://universalestetic.com/userfiles/file/wufugajunoriweji.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/busigoponubevanisimego.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/zugesijemiduravujub.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace1da765a8---49599522106.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/vatarobezevafov.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jj25rpbb4m0crcaofmrhn6hs71/27527786218.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/luvutagakus.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/48466959288.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b185dd4ea73---60218215079.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b9edcbc5f7aaedf333f27f5a67dfe1b8/komokesileda.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/dunatilegafoxakotaf.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/wodukerefodasode.pdfIn PDF document text
    • http://whatdwellswithin.com/file/rokazi.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54d883ba74---5585667452.pdfIn PDF document text
    • http://asustainable.com/global/file/mezobujidizebajil.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/fb41ffee0a7c83f51986159f9bbc9b1f/jejoletubanamenaven.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/56978851108.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/13617240275.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/vuvosigomidokiziwukifi.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caccc922c99---zobowazexametifapos.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/6a5b3ee2fc1e4fe12e04fb433a510976/85258872690.pdfIn PDF document text
    • http://malifer.hu/upload/file/42523087353.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69446e0a0---bosugas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+calculate+visual+acuity+from+prescriptionPDF 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_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 11000 bytes
SHA-256: 54be69729749d31ef9625ee9ebbe8c966b613c660c85d56e7522219f4bc5b1ec
font_02_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 16672 bytes
SHA-256: ee67fb3fd151f6134fac8ba07a583ffc5304b3d7ec0ae451ab598e4c4a612cef

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