Malicious PDF — malware analysis report

Static analysis result for SHA-256 3567df19aa706b10…

MALICIOUS

PDF

83.7 KB Created: 2021-07-07 05:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3dfd8b2a0e1963ba2805ffbf8caa221b SHA-1: f4d3ce407f74407f50c131d28cb905b1ff28fb9e SHA-256: 3567df19aa706b10b844880da4a43f80563b137230f0029a50699b5d42d6462a
104 Risk Score

Malware Insights

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

The ML classifier strongly indicates this PDF is malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports a lure-based attack. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://artlabjo.com/userfiles/file/2139683570.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e01vob5364c2ifdv7b74b09oj7/wugabalemobeduk.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bf4a92325576eac35e93d26fb8805ab0/59136502781.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3abcef600---82140803619.pdfIn PDF document text
    • http://policylic.com/uploads/files/sixefitagupewo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd73f920e5---salasabivotumasuru.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cac8adb458---liwugogubiju.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/duradulemezevi.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/6mdennk9mjf9o7kno2ls7fhhdq/ragikewekiwixefavaredax.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/61218408332.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/660600985073ad4ce9eebbdcfccac06f/nisezodefagan.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ekdbaiiu1ko86lu8uf99i8nser/5904801751.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/luketivuwokinu.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/wolexafese.pdfIn PDF document text
    • http://rld-carbon.ru/file/4380960005.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/togogemewazit.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/4hp2b1l4cj030uakvaqpfb6a2v/16362433229.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/qjjvggq3nt5ohd851np24gu0uh/81450468098.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0abbc1884---pesuzefefuruzivinenone.pdfIn PDF document text
    • https://ortechindustries.ca/ci/userfiles/files/desudonenefogufemex.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16081d03601163---22630719197.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/16375179411.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6d100ee5---19232903070.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/97999578026.pdfIn PDF document text
    • http://puppiesjust4u.com/clients/c/c8/c8a8d0e690f73854b1e7a5fbb9521f82/File/juvebulesifodijevunadata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hobbs+and+shaw+tamil+full+moviePDF 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_off0000e421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE421 16964 bytes
SHA-256: f0ecec1f7df29b9c610df1f5c372e62b21564ea69fca131ba5759e2854a4a0b1
font_01_sfnt_off00011076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11076 10900 bytes
SHA-256: 96b279008743f87f75a287c8cebaa7e68b27ab4bd375ebdbd0da5e5b71a8b1f7
font_02_sfnt_off0001297f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1