Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0e03b75b9cf9be…

MALICIOUS

PDF

85.3 KB Created: 2021-07-22 13:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4925d134ab93f512fded53bc82a0ff62 SHA-1: bcb664cd34f264a62d3f72bde86076892b97ca36 SHA-256: cb0e03b75b9cf9be02d2337eeae1a7214f5f4827b0779e77c01be0d25b3001a4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, but the presence of numerous URLs and the heuristic firings strongly indicate a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d28dd42ec7---tususopafusajavisovu.pdf In PDF document text
    • http://donelreunion.com/clients/5/59/59051ae02fa593b10ab13f41bf6316a1/File/81470933619.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/it3u0v0e6msvt91qnpg2375oj2/zilesiraviwuj.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad828365bb---78323356340.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/bamipemavanazim.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/13765042687.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6d4624822e6670ad2b818ef606ccb23f/vowolinexegepaxoduka.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/mowewemuru.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/66b8352c7bc962f3abb9b0f63282933a/sisobo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b35750b8cdb0c7d937fe9ffaf63a53b/43652758961.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/rexepe.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/5a5526c268f62031820940b152a04fd6/71101573158.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a607443268---lerekuzosiguwazif.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0fno7tvb7q1etb8ncqbljpk36g/18886844643.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/e3c72a09da2dd625667defddcc938895/gisabipagupodafixakezu.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/62592965557.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/f77116f942831fa6eee1a339ec320f88/pusov.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/39935496570.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d17d26a3d8---bepelazekajunedawegire.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9647dd2d1b---befunusazigu.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210602155412.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/sodadupuwakapo.pdfIn PDF document text
    • https://promise-land.com/upload/file/19487665775.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a01bfbb895a---fubejixitidovofazamot.pdfIn PDF document text
    • http://zimmerei-possert.at/30935755357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+cancel+ps4+subscription+on+appPDF 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_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 10764 bytes
SHA-256: ddedcdb9594f160f856d1bb5271b11ba592f541bd76a0de71af75cc37ab93890
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 17324 bytes
SHA-256: e54af8837e467c61b48e76bf4defe1db9f7a5e09dae0b4d30a6cd5477dc02005
font_02_sfnt_off00012f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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