Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2a383c9ecc7d59…

MALICIOUS

PDF

57.2 KB Created: 2020-10-26 16:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e459ac928b2387a9b55051e344f77f25 SHA-1: ec90aa4089006db6076c895909aed9e81e734fc8 SHA-256: 1f2a383c9ecc7d59ab12da41464eb3d59cd9ef3367f166f162d6cc85a7265b46
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/123?keyword=simple+machines+pulley+worksheet In PDF document text
    • https://mabogafopesusa.weebly.com/uploads/1/3/4/3/134307699/bewexipe_xizof_rofibodewojosok_biwev.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/sumipajugevix.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/76f736991d2.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/e1bcb39.pdfIn PDF document text
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/xubamapopituzem_xuxemikegu_ripenabifuteses_kuvalijorasup.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/a8d7b837-c8ca-4fe5-b6cb-7aa6b6e9169d/76281218763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcc3e1d-a997-4135-b3e7-f7809382f984/xijupavukujarifutajer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb976c5b-43ef-4787-8166-6a16f7d8f919/96545582448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bed7aa7-1c3a-49cb-b4be-1d7dae69cac9/biviwudunoparapinalasok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e013b99d-b92d-458c-bd3c-8120fe4b2d30/82329710881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830b031f-08b3-4309-bab5-2219431be9ed/84108079893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d437a878-50ff-43ef-a291-c098049cf11e/32993753775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb0deab-102f-4439-9ce3-de29f0894389/22052289241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8081/0140/files/nox_app_android_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/romanticismo_arte_riassunto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1819/0489/files/hercules_mother_disney.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0791/7209/files/class_diagram_tutorial_point.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/importance_of_observation_in_early_childhood_education_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/rakasonotomu.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_off00009f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5C 5532 bytes
SHA-256: a61d40a98a6dc642d21f82a53f6309a4105a92d376a8000bc6ca2aaf1d884a14
font_01_sfnt_off0000b211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB211 11076 bytes
SHA-256: ce00e1ad18f741da595a1472f7aefc29426b3f11d266809e4041b561c97daf55

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