Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9f937d5c6ae2ea…

MALICIOUS

PDF

87.8 KB Created: 2021-04-03 12:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f0723bbe364e01f78a3b7a24f1db599f SHA-1: d2cb7a124797ebd59169e54eae7ae2a958335dbf SHA-256: ce9f937d5c6ae2ea61d92b22151cd15fb03504db24b40e1a9bb0e8f8e1f8eaa9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning model as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous external links, including one to 'xajibur.ru', suggesting an attempt to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the overall structure and link distribution indicate a malicious intent to manipulate search engine results or distribute malware indirectly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://xajibur.ru/aws?utm_term=how+many+calories+do+jumping+jacks+burn+per+hour PDF link annotation
    • http://peramabejakes.sportsontheweb.net/lightning_protection_book.pdfIn PDF document text
    • http://kijumubafenu.mypressonline.com/26222721729.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_beec817fffa94c25b2ad8be7bb27a449.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/21692524622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b23c741-1e91-42b1-bd0a-2bb0f91392f1/python_remote_car_starter_instructions_for_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/cisco_ios_intrusion_prevention_system_deployment_guide.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/definition_of_urban_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e942c7-6cc1-4e42-8257-e658737257ea/55627780665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1a69c0-6d85-4a36-8c2e-e29f41aa6823/81228706150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb52e77-48f5-48ff-b9d7-3c08a0d19689/ver_pelicula_completa_gratis_la_ciudad_y_los_perros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3b382b-79b6-4bc6-8617-5944dee4043a/waluwezemiboxiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a332de-27e2-46df-9438-025c1eca90cc/duromax_hybrid_dual_fuel_xp4400eh_4_400-watt_portable_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f517b3d-e0ad-43bd-ad8b-2c06cfe2b394/36536594287.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/wukoxufiwurudowifoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6ca885-f6b5-4a07-9a46-97b70c83eb83/angles_in_a_polygon_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26a3be0-d4ab-4b34-9a7a-b44e92148970/summary_of_cien_anos_de_soledad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ad8524-e3ce-4085-928e-cb29ad1bb6ab/meade_instruments_8-inch_lx200-acf_f_10.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_121c8e4a118c4278819d535c7415881c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/12th_konar_tamil_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6662220-2a67-4cdd-b353-2d4de240e71f/89911045418.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_608ee72005484ad88504027c11a83112.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2056baea-7871-49a7-8aa2-68b04911d22b/att_remote_support_application.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_712c9c03fcbc43fe9df3e86401db4041.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f55dfc-bae7-4cb2-8042-9b50169596c5/gaxokovo.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/are_mini_rex_bunnies_good_pets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 5724 bytes
SHA-256: a7495aa785c7df3f16762bd10d261ff9465bc0c25d047b0786543ac2b405ab29
font_01_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 11124 bytes
SHA-256: 19a1cdfd1e7b8f7a7a5b02bced6fd51dea646072d4e7d4cd50a584b051bb89fe
font_02_sfnt_off00014368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14368 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176