Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e01ba46ce0a96e…

MALICIOUS

PDF

45.6 KB Created: 2020-10-25 19:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7eabb238f2658ecf7ea60a4277e5fb05 SHA-1: f83b66690691f1c5c6e60301933f1ddf80b53db8 SHA-256: 39e01ba46ce0a96e4e01016051f2c2f1ac5e815a0276ca15e0b0ed5754a9a47b
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://ggtraff.ru/pify?keyword=android+10+for+nokia+5.1plus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f88015013463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f954d2e40d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f8dc1a7acdef.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/juposajudasidapalire.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/3819095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f87063bab158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f8e9981c948a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8b2c9edfc1b.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/9591872.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/nozezog.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/fetotuxuwimi-vokurakemusuter-simuwore.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/6323409.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/zetare/gorukunegufavenexidumed.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/rokukolirix.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/ruzex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7264f259-7c8d-413f-9477-984ce2fea5d4/75678478979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2437d4a-e9b6-4834-b6cc-cfe64bd4edac/fariniju.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_off0000661d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661D 5440 bytes
SHA-256: c49463e80abdd269052f6555b0c90a6828e5e687f839638a6f326421d9e2f60e
font_01_sfnt_off000078ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_02_sfnt_off00008253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 11484 bytes
SHA-256: 91c6ab7feca6853769f2a459b02f91b9f3fbcc8f59b066520dd7d9e45492cfca

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