Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9de855f810788a…

MALICIOUS

PDF

74.8 KB Created: 2021-03-05 14:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d38c257b008100089b3af979b0e6f267 SHA-1: dc6d132fbfa8d0084e7e87e058aa6dd76a4294ea SHA-256: 8a9de855f810788ac1d5f59b1b3b8f7eef1dd4a79f0a2f0227dbce57c1ab0fe2
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a movie title. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful websites, possibly for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=al+otro+lado+de+la+linea+pelicula+completa+en+espa%25C3%25B1ol PDF link annotation
    • https://pogosarixuxa.weebly.com/uploads/1/3/0/7/130776079/gozukuzakobimavizob.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/ih3zHgf/cop_duty_police_car_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/fiej0ig/dapijizire.pdfIn PDF document text
    • http://piwakere.iblogger.org/muxazuwekapazakurup.pdfIn PDF document text
    • https://sifuparara.weebly.com/uploads/1/3/4/3/134352995/e097095f.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/frXyjaF/talking_parents_app_not_working.pdfIn PDF document text
    • https://sovokuragul.weebly.com/uploads/1/3/2/8/132814371/7948340.pdfIn PDF document text
    • http://melodabogaso.66ghz.com/android_studio_upgrade_kotlin_plugin.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/zosovas_tudelu_lixukogulimu.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/0hdDvjc/86323854418.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/ghdWZJA/worigizefusizosiwakitagok.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/xejilemibizofuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/55827683837.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/kajidasekap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b239ae-dd37-4536-8427-2aca1c67e3df/percy_jackson_and_the_battle_of_the_labyrinth_first_chapter.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_0cdf4339404b48a58bd4a2f53c3c6557.pdf?index=trueIn PDF document text
    • http://dijilupejiba.rf.gd/87867106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a711e0e2-5756-4dba-aa19-9aae99d23beb/how_to_replace_kinetico_ro_filters.pdfIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_f0d099c5f9104183b2971ad9d9efc9cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/venice_boat_map.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_63b2729e428c49ef983c1cc8ad380410.pdf?index=trueIn PDF document text
    • http://mezizafija.rf.gd/best_riding_lawn_mower_for_hills_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951f282c-930c-4dc5-83f8-cc3f1b856f85/kivipogenupapiked.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_dbb8cca7f41749caad7fcd082560e713.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f68378f-0045-4028-9c42-9e64c05c6fc3/wepuvegijej.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/be_with_you_2004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8deb301f-025b-423e-9d2b-f7e25ff5402d/ge_cafe_gas_range_reviews_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/ikea_catalogue_2018_uk.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE280 5420 bytes
SHA-256: 8fd3cb23718736c8b392b0e1166301ac4c3a440b7e7fbff18e83dd369decd1dd
font_01_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 11624 bytes
SHA-256: eb09fc5036f36ed25d708c9bbd01ff04d7c2655d99b2dc1c387aecc8b41fbb46