Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f877cb99f6d7e6…

MALICIOUS

PDF

80.8 KB Created: 2021-04-22 11:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b78e7cfb10be8bc01b7fe0fa964dfd27 SHA-1: b6835ff9af5c551420cf82f2feb1042fc3bd9ccc SHA-256: f3f877cb99f6d7e659600708a99be199a5a9813499e205d223dc9ca0c679b96b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains references to 'cyberpunk 2077' and 'crossplay', suggesting a lure to attract users to potentially malicious sites. The presence of external URIs and link farm heuristics further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=is+cyberpunk+2077+multiplayer+crossplay PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://getdouche.xyz/phone_repair_on_polkwus41.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/bendito_jesus_letra.pdfIn PDF document text
    • http://paselon.getenjoyment.net/87227404722.pdfIn PDF document text
    • http://zootime.store/18663457227m57w2.pdfIn PDF document text
    • http://namelesssouth.xyz/60175781788kllm5.pdfIn PDF document text
    • http://mebelintera.ru/is_ideal_fit_a_meal_replacement0189r.pdfIn PDF document text
    • http://palawawez.mypressonline.com/vojefisudamepolalusawu.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/jubojojejaj.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/23922770158.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/11283593298.pdfIn PDF document text
    • http://jupifidupepir.getenjoyment.net/tesajubipuvuxusatilafosep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_906a3d8e938e4c86981ad166a692b32b.pdf?index=trueIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_a033a9b99fac4c0eaf241ca278597ad9.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_dadc8da0a920406a86c586521d702900.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_d0a3c97fdfd247cab6521e7fcb75e04a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/52012158214.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/balanis_antenna_theory_book.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/48118785436.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/how_to_check_intel_motherboard_model_number.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/ielts_academic_writing_task_2_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/xoxajulesupovena.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_off0000fb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 5676 bytes
SHA-256: bb69a866a407aba7fab9d94021cfe996b6d5554532e5f6c04c67163ed81555f5
font_01_sfnt_off00010e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E76 12036 bytes
SHA-256: ad5b808ecde5735c1d76d0c8ddf46bc636c44147fba2ecf07efa30ab73d576f1

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