Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2bbba2a884faa0…

MALICIOUS

PDF

75.1 KB Created: 2021-06-08 06:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5644fc4ba6fafa8688e6ea01f099ce63 SHA-1: 5156208ff888d79ad71b7f3c746870bc7ec26c6f SHA-256: fc2bbba2a884faa0d1744f4963ab92891ddafeb27467ad1c578f63699c482534
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, with one prominent URL suggesting a lure for a "money generator". The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, likely to manipulate search engine results or redirect users to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://philabc.ru/pbw?utm_term=nitro+type+money+generator+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fd7dba85e9ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_60beda434c6ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_6031f0b011131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_603bb01be79b4.pdfIn PDF document text
    • https://sabiverusixupo.weebly.com/uploads/1/3/0/7/130738528/fovubutefivami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_6026a6b7b938e.pdfIn PDF document text
    • https://vipapesad.weebly.com/uploads/1/3/4/3/134369303/lisukot-voruxanusoliki-deniriteki-wufovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485299/normal_60bbd3353f979.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_6008a4011d254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_60bc45347327b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370302/normal_5ff42ed51d443.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/1110f02b0a227e.pdfIn PDF document text
    • https://jedogivezuse.weebly.com/uploads/1/3/4/8/134862252/suweza_zovigufilolok.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/9d5e12a4-7ed8-498b-8305-102522733348/dojinivixenomitumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07de2d56-2baa-4b01-b55f-74e0b72da9bb/korean_for_dummies_audio.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144416997/intel_bluetooth_driver_windows_8.1_download.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144453288/20340035115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1f6969-7e48-4fa0-9ff1-f68b30c9f8be/how_to_reset_motorola_surfboard_modem_password.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144797709/que_beneficios_tiene_el_bicarbonato_de_sodio_en_la_piel.pdfIn PDF document text
    • http://gegoxelaw.pbworks.com/f/mebalugefatuzuzogumoliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c10d9d-95ad-4e19-a479-0cc4d8bd6672/zugewebaka.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/vewax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ffb279-7a20-4128-8377-eeb045ffb12b/51439807211.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_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 5488 bytes
SHA-256: d67632cfa5a14f7b81c035f087008fce9cad240b19c7c4a2a5607bf6abe134b5
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10984 bytes
SHA-256: bed803322574558ecd5ced4a054c3bdd8b93a7dc9c76e2b04893a3c1c408427a