Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f3986792bf250a…

MALICIOUS

PDF

81.3 KB Created: 2021-07-15 10:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 75db5a354871b3eb73555836fc54bae7 SHA-1: 4dc0d49d341656806d842ce5d276bac49321e2c4 SHA-256: 11f3986792bf250a4014bac0426b1c77bbab01585a6e46638c08b72ab6595aac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://smidgel.ru/uplcv?utm_term=the+conners+online PDF link annotation
    • http://thaimassagemodel.com/ckfinder/userfiles/files/71658354040.pdfIn PDF document text
    • http://www.asslar.de/downloads/45594007104.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c0558e0cae2f585e16d07f592b14236b/verufelajakatovu.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/8248574519.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/43244324600.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/venuwax.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/luxedu.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/j4eoi7vm76rfdhpfk6jg784324/wusuwojep.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/25616741308.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89c120e940---11940989069.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaa52150f1---8592108020.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f96783eebc---kugudojo.pdfIn PDF document text
    • https://davaocarrental.com/images/file/widalazenisedenafemo.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/81834180348.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e729941c06---rinemogetiwoledoxibixa.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/s34g35sug2h69mk7009ohe1kv2/tilegitubilefuleb.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/10792509413.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6f29d0cd3---27357295374.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/rulevagudi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abbb7d72678---49088137272.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5f9f44455aa1398fab849f8fd1ba389f/60515912555.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/bifemenamukipagitidi.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160989c080d8bf---kujilefalifap.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/81849439010.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/93848409328.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0652686001620773561.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/36324001477.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 17580 bytes
SHA-256: 22e2a69cc23aaebcd050471600766f8c150055081628aa06ca9b228f3cde06f1
font_02_sfnt_off000121a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A2 10032 bytes
SHA-256: 685eb8bc206951f319b5183e0866e5154bd0933f5208f83773df371797801d55

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