Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b0267cad28df4…

MALICIOUS

PDF

86.0 KB Created: 2021-07-03 07:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 91f1427656f4c8caa834af08b20929f3 SHA-1: ff72ea9b8871464818b023ef840373bb67e82815 SHA-256: eb1b0267cad28df4a80070321385312020946aa73029d5e410b2a380583fc4e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The presence of embedded URLs and the overall structure suggest an attempt to lure users into clicking malicious links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://archism.ru/uplcv?utm_term=online+movie+ticket+booking+use+case+diagram PDF link annotation
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a318815567588841ef6141aaf6374f4a/73561841855.pdfIn PDF document text
    • http://kasargod.net/uploads/file/vudix.pdfIn PDF document text
    • http://industrialdevices.in/uploads/jazurawa.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/sizepafopatofujesezokodo.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/8070aa6d4abd1b8586323c45909d6bed/18940929930.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/sosatixejatotonatuxuz.pdfIn PDF document text
    • http://tauzetaques.com/clients/1/1b/1b95303171b4519794d6fee637ef680e/File/60722371128.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb15f28ccd---16783568892.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/8j0ai5942rm71rho2ohplo80q6/77316280081.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/62856676436.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/cq6mdei86atq7a6buhgtp41t4u/52151368337.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160beebd342ca1---kafulemugusawazomotitoti.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/cb73ba0a42bb1e6116a6b3e212452055/17138842035.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/28e940f6bf4940bfb934954a63f4890d/nadefojisapab.pdfIn PDF document text
    • https://carlojans.com/cms/file/78300938807.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/56024829172.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/c3d563be859057f7f01512010d2b95bb/57236773102.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/02f4de3d36530ae4f1f9e9a690c67218/42889951619.pdfIn PDF document text
    • http://huntland.hu/upload/file/pakopunepegikobibazibos.pdfIn PDF document text
    • http://sdds.be/userfiles/file/93944422192.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/77634506363.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/atbnjtt0t85ianpl7egj5nlolo/zemoviwitudamiwutuzawavu.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_off0000ebb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB1 17264 bytes
SHA-256: 75fb50375d2e54c03ad1aa233ee54b21f41a392e6ac8ecc3fb51c654c4fd4ef0
font_01_sfnt_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 11136 bytes
SHA-256: 41d347ea7c05be13050b1d57423050f203e11b1b8e225821bcb38a6001d3fde1
font_02_sfnt_off00013263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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