Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6c33ec69c7c315…

MALICIOUS

PDF

76.4 KB Created: 2021-03-07 17:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1da4574e4dc51ccedadf2bf00528280b SHA-1: 91a15f4878faa645b39702ba54a09f7f671029f4 SHA-256: df6c33ec69c7c315be00cfe64f6ea5a966b7fa3d379298c8bc71561065226d73
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, with one URL specifically mentioning a camera manual. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of multiple suspicious URLs points to an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=manual+for+canon+ae-1+program+camera PDF link annotation
    • http://pazifelurup.medianewsonline.com/pezel.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/un_curso_de_milagros_leccion_52.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/lomidetutefasujejulaj.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/5865523659.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/venabajibemupunukimi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ade08c-adeb-4df0-90e9-8cf11524fab0/data_warehouse_schema_design_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf90a04-2911-4cf1-8718-60f4312bfdbc/jenelapupotubakafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306abfb7-2a1f-408c-a011-ed5ea4205815/why_wont_my_fitbit_versa_connect_to_gps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f141f2-f46e-4ee5-b409-6f9e0a448a61/savebalo.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/64735313042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b7a64f-dcd7-40c1-95b3-e06e744ee704/national_boy_scout_office_irving_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef102f10-97d4-4a8f-9c55-cf9a142caa4b/the_door_in_the_wall_full_movie.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/lexus_rx_350_for_sale_by_owner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4954fa3e-3221-44aa-aa70-bbe9ae125583/surgical_knot_tying_board_diy.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/38025137999.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/research_methods_in_practice_strategies_for_description_and_causation_2nd_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d240c80-e2f3-470a-b4d7-9463f45be962/edo_girl_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20da24e-9ab6-4f19-8a4f-289ffcb9c17a/rebakobutogaj.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/73813958587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b651ad60-2c1b-4812-9cf1-4cb9dcf1c934/70759945699.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/38476091687.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/4725479717.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_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 5248 bytes
SHA-256: 556ef812ad3f17dc332e6efe12f195bda7ee4e282f8281d7d9f991e23f87ddcc
font_01_sfnt_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 10196 bytes
SHA-256: 77d48186b20f035873dfca05f0beeee084ac214acbe4a39e1e92b2e0f37ccab2

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