Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aebffab3bff8a86…

MALICIOUS

PDF

73.1 KB Created: 2021-03-23 10:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04cee621a9c9894afc1e782e0b4d2285 SHA-1: cb78ead4889eebec66e9c2e38946b230d127f8f0 SHA-256: 1aebffab3bff8a86eed5d89ca356f2fc7189f848447aa84aa4846b88944eed6d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common tactic for SEO manipulation or distributing malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this behavior. While no scripts were directly extracted, the presence of numerous URLs, including one pointing to 'fokemale.ru', suggests a potential phishing or malware distribution vector. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://fokemale.ru/wix?keyword=gloria+who+might+be+my+friend PDF link annotation
    • http://bluetea.space/yaesu_ftdx-1200_reviewdy6a4.pdfIn PDF document text
    • https://detatabuloto.weebly.com/uploads/1/3/5/3/135346227/c7c3e6f32c.pdfIn PDF document text
    • http://biotringel.shop/vidopupindtenf.pdfIn PDF document text
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/be84d3c37c5580.pdfIn PDF document text
    • https://resewirebibabap.weebly.com/uploads/1/3/1/3/131379054/tegelakumeno_jadow.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/cd3f04b8-cbb7-4f82-a687-d8e2a4511817/6059504490.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_458ac71f74174dce8dadf1ea822fdd19.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_203fe923f06041fe9a6742c1dd686c75.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b5c265f-c248-469c-b22b-b78aaaac968e/stihl_fs_130_spare_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9187cea5-9579-401a-8f25-0d73f09c0b84/formas_de_comunicacion_oral_y_escrita_ejemplos.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_c8c4a4529cdf494ba6ccfc6152903894.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89bfe6a-66b6-4108-bdb4-75d0a0cf8e97/fundamentals_of_drawing_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da4de3b-b8ef-4194-a138-1ce146d6b98a/best_classic_country_ballads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29db2ff1-3982-4b40-b0a3-81a40b411129/simple_human_soap_dispenser_will_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d2d445-99cc-4dbd-a140-16aa8bffdafc/pisikovufiwunowuxebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515de0b1-2a36-43e9-bb1a-8cae7feffbf1/maytag_bravos_washing_machine_error_code_dl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba70c96-a3f9-493f-b338-1ecaedb4feb6/que_es_una_imagen_digital_en_informatica.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_1cdeeee788c54d4bb7ae23da8cf9f1b0.pdf?index=trueIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_bd2fb7edb51e4030b79817938ef96170.pdf?index=trueIn 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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 5508 bytes
SHA-256: 2794246977cb44482e7150aa26f29e42bcb1566126dd11384763e14b0afedbe1
font_01_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 10492 bytes
SHA-256: 52201ad5ee903b12520ce65e503772c7015fb2edeeaf76f963a242ea3ed8e68b