Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb74e92bd557b76…

MALICIOUS

PDF

132.8 KB Created: 2021-07-16 04:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fe6313f95155d046ed80e550a9b00062 SHA-1: f53b623ca88d2bdc37201ece1cb1468553543d80 SHA-256: 1bb74e92bd557b767b2b16b54c6d57b1b96a10dc6ba03a78ca24b3254ac6dd68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the primary attack vector appears to be the extensive use of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9716

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://ketchas.ru/uplcv?utm_term=example+of+caption PDF link annotation
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf97901f01---binarisikin.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/cdefc7cbdcd02bd3965b119fb88b382b/tarozururoxeduwawizi.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/190131335179.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/28120856389.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/42n69baanpnhglk04lmjjsq600/18394199853.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/48730008270.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e50bddd0e5677604549549cecbcf9b8/goferupukemagito.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/masopilovozasewun.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/772f27c3be67dd028de491adffc1c096/38059607336.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/35137497073.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/vuziduzerod.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///tuwonew.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/682751f975fb437840af7d0a1b3187b4/busufekuzuviges.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/e989ba43647bbfd52f68e46584476d4a/31908343920.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/geduzaxupijuwevofilolebo.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/bugodosewujoju.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608681a023b2c---7223375906.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/93kc4suuilffkaj4o7e3dgh2g3/semenadib.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b952f57dec9---78379159398.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3212a605da---vaxolinelulusi.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/wevotosu.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/nofiwebe.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a4f40b0d9---vujunijadadina.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/e2a5a48b75401aca8da4f2df46f40d47/25969424884.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E19 10456 bytes
SHA-256: 4aaced213365dedd5e5316e791ae4480802150845c0e4f3afe7c567ff9991c3e
font_01_sfnt_off0001a5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5C8 18164 bytes
SHA-256: 0055de5d3a9539ed0a3a698f793798b8ce6bd47d475bf764d6bf406e74777ad9
font_02_sfnt_off0001d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D604 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off0001ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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