Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8095e87055f78ba…

MALICIOUS

PDF

91.5 KB Created: 2021-07-02 02:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bc0d4f8e13b3fff4ba275287b8674316 SHA-1: 5b625e8a76652df5c1ccceb70d331395ff9899af SHA-256: a8095e87055f78ba6781d5a5780496f1f07d5eccad439fb6275c7ce69ca15627
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further indicates a malicious intent to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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=ode+to+happiness+shadows PDF link annotation
    • https://toananhmedical.com/uploads/files/dexuxe.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/85316813727.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ca390b57f---riran.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf7d46f3c---324963528.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609dda5bea8fa---3662293201.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/wunope.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/xomij.pdfIn PDF document text
    • https://yalcinplayer.com/calisma2/files/uploads/xegabisamupu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f0b480d9b---37398664993.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/7043f9c58da5d2ff6f00600af4c3247e/14780307642.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3e56e64bfd2e63cd7ac14bffbf7e3893/83584669144.pdfIn PDF document text
    • http://vce34.ru/attachments/file/vaporebuv.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/rajowavapu.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/pujezederowedam.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/26pfdr9e0hnfa7lknl4c8cl9m3/pivugafinodax.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/75873138503.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/xejuvoterugumixu.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/63087409391.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/rimorakobivuzag.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/fefunasaper.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/fc0a2f6e9b775e18bae6fce97727c79d/zijelujixarepepubokaga.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084237ee3969---44353675939.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/f6m3itja911n3aa833oiihm678/fufogizikop.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/5d430874559d856180684cb210e6d915/27575447928.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 19064 bytes
SHA-256: 40f5daa2f32f34179e8a3394118544214641aa95150786932ff603f387003200
font_01_sfnt_off00012731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12731 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3E 2256 bytes
SHA-256: d69f4d4d8f532f0a441035a85c231e1b7391c4ffb8b6e0edfa75147dcf152ad6
font_03_sfnt_off00014939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14939 10456 bytes
SHA-256: 63b459330603667304ccce4506df909c4403e11e1761889973ecd75c730427f1

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