Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69b99d71c122d35…

MALICIOUS

PDF

87.5 KB Created: 2021-05-19 14:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e10c86cd3032be46b3d468455268a0f7 SHA-1: 632ef1728df545ecc3435c2be46ad13774171933 SHA-256: b69b99d71c122d35c10b16b1006780570c89032e8507c6636e63967367708b1d
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to drive traffic to potentially malicious sites. The primary lure is a promise of a serial key for "Rollercoaster tycoon world", which is a common tactic for phishing or scam operations. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=rollercoaster+tycoon+world+serial+key PDF link annotation
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/kuxifagujelu.pdfIn PDF document text
    • https://dipediras.weebly.com/uploads/1/3/0/7/130739778/wekija_xebululak_vajanoginudaler.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/kogojixitujipimutib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368999/normal_600876519deca.pdfIn PDF document text
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/tikoraxojugipepaj.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/xelajeduzuwa.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/534718b4fc34bf.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/92fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_602b585dc0f2b.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/3b93092c-c50b-4fc0-ad29-228a3660dec7/fezumanabujabasakagumemin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9a9635-6a12-4467-9252-49cc32cd07a2/national_boat_liquidators_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff366da-4aad-4bef-879d-60cad00eae10/swann_dvr_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92a8d31-f1cc-4515-9402-bf3905a0208f/66045294230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d34272-4820-4e69-bb0e-2ca3cddf2865/bose_wave_radio_cd_model_awrc_1g_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f508be-2ce7-4f01-9303-e03779316dc0/how_to_remove_a_white_rodgers_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ba49e5-9089-41f7-889c-a14389943ef9/65555821808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dab1545-d7b2-48e3-be04-dc376fb8b23e/how_much_is_disney_world_dining_plan_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc4c9fc-3541-4611-8f69-0eacffbe8653/is_southwest_premier_card_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b064ea19-9278-4bb7-9649-17a67306f903/somoxagojumuganivuve.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_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 5196 bytes
SHA-256: 85633000e4d81261a3f35d5d2755b5673a72af4f6c099e8ee1fab3b4c479f3b7
font_01_sfnt_off00012cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF4 10300 bytes
SHA-256: d582c4f6e46cedf52e6e02248798d9b7c386a0ab9e1478b6149a52a80e708db0