Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c010c776e6a8313…

MALICIOUS

PDF

79.5 KB Created: 2021-03-08 23:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 38a022aba804d180612c2c6a6d9fc44b SHA-1: 802972a2d7cb4758d9f13ce3661735fadf6c8fbb SHA-256: 7c010c776e6a831316f14fd5d27e84dcfde3819916218c681105a3e70dea453d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on dynamic DNS services or cloud storage, suggesting a link farm or a distribution point for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=statement+of+comprehensive+income+template+pdf PDF link annotation
    • http://tejovotemikodes.getenjoyment.net/what_is_criminal_law_australia.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/young_and_freedman_university_physics_13th_edition_free_download.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/private_sale_of_ar_15_in_massachusetts.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/bosenaximelugujirofot.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/buponuwebi/musibidugubel.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/68006754274.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/3140564967.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/what_are_the_four_steps_involved_in_the_training_process.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/civil_rights_training_answers_texas.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_7746fb6f44e84239befac13ac5c9255a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad0ad0d-9ece-41fb-ac16-35dddcb82399/girexafepumo.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/which_keurig_coffee_is_the_best.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/23671545870.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/28790201415.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/xinarowozu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/coordinate_plane_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed96d6e-3060-4884-b405-0ba0fecdd913/beethoven_piano_sonata_op_13_imslp.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_2d26c7945c4840b3b865c520fcf66168.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/70688535922.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_1c28a33ced2b432bb88d59430e7e664d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/92144835688.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_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 5556 bytes
SHA-256: 80563fb574440af0833c1c3ac4bf952a20c67b173dcbce54c78969e16f80f3f4
font_01_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 10764 bytes
SHA-256: 78fb29e278f1d65cfe78c2eb0cc210111fa4de3923f0507f976b9602eb973577

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