Malicious PDF — malware analysis report

Static analysis result for SHA-256 099dcf0747fa81ec…

MALICIOUS

PDF

84.7 KB Created: 2021-05-29 14:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0ea9c4bfbfceaad21affec0e65aa6e52 SHA-1: 2eb2255275699e3bb156d990af3dcc5dd82b72d5 SHA-256: 099dcf0747fa81ec9acc849ca64a2224fe42a01d644e18bd4ebe31d8e5b02754
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm designed to manipulate search engine results. The primary URL, 'https://gimoguvi.ru/strik?utm_term=hello+neighbor+act+3+basement+shadow+man+xbox+one', suggests a lure related to a popular game, likely to attract unsuspecting users. While no scripts were directly extracted, the PDF structure and extensive external linking strongly indicate an attempt to redirect users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=hello+neighbor+act+3+basement+shadow+man+xbox+one PDF link annotation
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/depinanagelijuxawot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_604e39c79d6d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5fea001b4a8e6.pdfIn PDF document text
    • https://vurigejowuzebad.weebly.com/uploads/1/3/3/9/133997249/jasakixokegufiru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_602a38c9a8f3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418401/normal_5fcf04a632a53.pdfIn PDF document text
    • https://jumuvive.weebly.com/uploads/1/3/0/7/130776409/a80f87a3d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_601cbc25da495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_606c32fbedd7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/670b07a8-2e7e-4d42-aa8a-0d11a0c73505/10418058349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef22db90-f3ff-407d-9d24-22d5768d4dfa/37509531408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1652f4-b251-4ed2-9c8d-86cfc040332c/maytag_bravos_xl_washer_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccc215f-4330-4e65-8378-37b3d2093931/numeros_decimales_periodicos_puros_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08be3ed1-c24d-4d52-a4fa-82513bf32c43/state_four_importance_of_curriculum_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18cbe26b-aace-4d24-adf6-8e4edc8d51ef/how_to_cook_rice_in_cooks_essentials_pressure_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ffe9cf-1c0c-4eea-b38d-95afa85373c2/lafesoxixulizamadegilon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c72226-3ea3-405d-b823-71e06efa52a6/cuanto_vale_1_metro_en_centimetros.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_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 5564 bytes
SHA-256: acdea5c36d000562a9620156d32c60758c7a3ff6fdf3778f2f42ad628e1026e8
font_01_sfnt_off000111d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D8 10960 bytes
SHA-256: dc55cd16881eefdd64cea92a70fef40df31a289166dbc683b4f5504cbf153d9f
font_02_sfnt_off00013775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13775 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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