Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8767d3d9f29283…

MALICIOUS

PDF

73.3 KB Created: 2021-04-16 16:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4c5a65965bb7ac0a1a07130651e0bfca SHA-1: cd05101af3fda9e901ba3fa96656dac3272de9be SHA-256: fd8767d3d9f29283ff25eb5bee969fcf59ddaecd815ceee8061dd564ecd6ed2f
216 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a link farm. It contains numerous external URIs, with a critical heuristic identifying a link farm pointing to a redirector. The ML classifier also returned a high probability of maliciousness. No scripts were extracted, but the presence of external links and phishing indicators suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/fugivugaripa_xulomusaw_valipanakobefed.pdf.
  • 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://vilenefex.ru/strik?utm_term=stealth+cam+night+vision+monocular+youtube PDF link annotation
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/fugivugaripa_xulomusaw_valipanakobefed.pdfIn PDF document text
    • https://bakinoxeveraj.weebly.com/uploads/1/3/0/9/130968963/e7ce485544.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/XJhgHOE/big_truck_for_sale_in_ga.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/risaru.pdfIn PDF document text
    • http://fozivot.mypressonline.com/7917397153.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/zQEvicf/xivokevodu.pdfIn PDF document text
    • https://ridivuxizoram.weebly.com/uploads/1/3/4/6/134633738/62f9565b.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/verbal_reasoning_sample_paper_11.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzomowa/cnghijj/holt_mcdougal_larson_algebra_1_answers.pdfIn PDF document text
    • https://zixozuji.weebly.com/uploads/1/3/1/4/131454221/tatidisiguv.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/WRgiDtZ/kedutolukedabat.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/sgKvgiJ/rarijufelorotedotod.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://s3.amazonaws.com/jedaxopopuko/ledugalusutunubenap.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/study_in_scarlet_sparknotes.pdfIn PDF document text
    • http://najijojovigom.myartsonline.com/49229890003.pdfIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_1182d6c97f8049cf82cfa4d79dcdc63f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/act_practice_test_2015-16_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/39947972069.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_f4e098038e33461da5028e42cc04911f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/excel_formulas_if_cell_contains_text_then.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/jumezuwejaxotodi.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_4e2bce3f2bdd4a25860d53c51f71b450.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davawina/73160331614.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/find_merit_badge_counselor_list.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_off0000cf9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9C 5500 bytes
SHA-256: 57731f7c49687a8a836724dc970003256da31ab3e4965da07919c97c3a08986b
font_01_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 12280 bytes
SHA-256: 2684b2532817169335147734e99ab6ffae24094e0e26956d47b3219cacb7df75
font_02_sfnt_off0001098c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3