Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3f031eb9c0972e…

MALICIOUS

PDF

55.6 KB Created: 2020-11-09 15:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6ad4823f16f2e5ff1677c51073b4a849 SHA-1: 93b78a1adfa8af22ba459289375332ac90e0e242 SHA-256: ed3f031eb9c0972e120e07f1625c051f286b93cbff17d0d322e9a15ffc0483fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=justin+bieber+popstar+magazine+photoshoot In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5f931a0757c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f922e5e350a9.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/b98d2cda5427ef.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/8da4391c-e574-407e-b555-9db9ae7e8466/xotokukopitanoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e97fc3-5f4f-4e2f-bcfb-436d38ef1ceb/sagatiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96df3167-3f32-41a6-a71b-66e46563ff9d/91298414392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8513d3e9-3a3c-46fe-9a8c-400fff2dddf7/juluxoviwuwokobir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940c4d77-3b63-4f55-89ec-3c4767dbd77c/creme_de_menthe_brownies_with_hersheys_syrup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3942a4bc-e389-49ee-a073-93462c78d7c1/lowaputaworabemugoxiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85d4c5a-8912-4181-a282-a5fd74c4c22a/26398918391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50aaebd-ad9e-4e0e-a62f-f144ce0f3d0b/gufoxiredewibedikenog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225cad9a-949d-4da8-be44-ff674500989d/jegunaxelibagib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74783ef-847b-42e9-afa4-adfaaebcc3b3/clasificacion_de_antibioticos_por_familias.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7095 6588 bytes
SHA-256: c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285
font_01_sfnt_off0000810f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 5380 bytes
SHA-256: b720e32dc81931572042651a61b0be88bdbfdd47f64e5836eed78fa5f5cac70c
font_02_sfnt_off00009324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9324 8604 bytes
SHA-256: 1cb5482a586883d78665ca1ee63370c8dddc84855caee5f1bdd7b1b5fbfbf2c6
font_03_sfnt_off0000ab80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB80 10700 bytes
SHA-256: 9ecf960dd734c79a3d2303a69d78efce4b5c76bac8b675a7164cd70338476c50

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