Malicious PDF — malware analysis report

Static analysis result for SHA-256 b049f3f17d76a4a6…

MALICIOUS

PDF

79.2 KB Created: 2021-06-12 08:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 61710ecccdcbf8673f78539975ead68b SHA-1: 09c1ee2f8fb6041c04d27d3627d09af3e023639b SHA-256: b049f3f17d76a4a6fc554cdad321af753069461a91d686296084a6238d11b500
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body contains a link that appears to be a lure for downloading an older version of Instagram, which is a common social engineering tactic. The presence of an external URI pointing to 'ketchas.ru' further supports the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/pbw?utm_term=instagram+old+version+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450502/normal_601ee902b610f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_602e3c6a23c76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_604b9b6028073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367916/normal_5fee2ba3d3800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5fe2d73dd63f8.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/e5a5b24a-4aa2-44a0-b706-a15cf4835cfb/panen.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/f/pci_simple_communications_controller_intel_download_for_windows_10_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf1788f-14dd-45ff-92c8-7fcaec79a116/zaduvoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31059271-db88-4f32-b93e-02e7c7b71947/rt-n66u_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6d13d2-2929-475c-afbb-5e61e2f59b2a/mejavazogofujixofexodiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ca0d26-f404-42b5-98e5-e4d674a20e21/salary_of_aircraft_technician_in_canada.pdfIn PDF document text
    • http://sujagajo.pbworks.com/f/really_rare_psychological_disorders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af26dc3-9a88-4b8e-80b1-83152a4791ed/tebuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a1fb8b-945d-49ff-9a0e-e4b9e1600c06/42413091573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f69776-1eda-4f70-aae7-58ec6e18966b/gozoneral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38327176-b257-431a-9b38-6266dafcab62/al_anon_paths_to_recovery_step_1_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316825f6-6bdf-4c23-88d8-1248f6fb0fc4/million_dollar_habits_brian_tracy_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fe2bee-4007-4843-a497-eac0f7c3a3b5/11799787379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ab70dc-adeb-4f17-b1a3-0372e49fbf39/niduxepaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659e1a6b-3ccb-484a-b271-ea2c499d8f25/el_caballo_de_troya_historia_corta.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_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 5232 bytes
SHA-256: a3d542c26891112ba453e959a363031a205c9b221b7698d0497093fe56fa8a88
font_01_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10720 11208 bytes
SHA-256: dfa79fe5bc1e6c3ac6ee21dfafa1ca01a308ca46f161d1d6a5adf667f25bc73c

Open this report in the interactive analyzer, or submit your own file for analysis.