Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b8f6f6f4a6bb77…

MALICIOUS

PDF

86.7 KB Created: 2021-04-26 00:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dd3599fbe48e2cd321cfad12964879ef SHA-1: a8d40036e42d19cad207a0cb2763b5f5b3fe7404 SHA-256: 11b8f6f6f4a6bb775aad64d03ec9584151b9ddef013077d02707ab0996ed561f
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary suspicious URL being https://mezovuduw.ru/strik. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm designed to redirect users, and ClamAV detected it as Pdf.Phishing.Trojan. The document's content, though heavily obfuscated, appears to be a lure related to 'black fennec price xbox', directing users to malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/strik?utm_term=black+fennec+price+xbox PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457000/normal_5fcc2bb0b18c1.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/gdmFsGm/95293685777.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/short_note_about_school_life.pdfIn PDF document text
    • http://boldly-grow.com/honda_gcv160_pressure_washer_hose_sizenc7l2.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/tR3ghKJ/waselopiworizemabotozuj.pdfIn PDF document text
    • http://xsafak.com/clasificaciones_de_las_cuentas_realesj2jr5.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/analog_science_fiction_magazine.pdfIn PDF document text
    • http://vedivux.mygamesonline.org/29766653155.pdfIn PDF document text
    • http://gtomishebs.xyz/judipujiwgonn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_604d1a6dac649.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/quality_analyst_interview_questions.pdfIn PDF document text
    • http://naykaryadom.fun/nozukepevujaje6uwjf.pdfIn PDF document text
    • http://supsun-aero.com/carbs_in_dunkin_donuts_frozen_hot_chocolatebqi4m.pdfIn PDF document text
    • https://naleletilasimoz.weebly.com/uploads/1/3/0/9/130969891/wutube-nolutopijaniwa.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/repizodibasu1xsp8.pdfIn PDF document text
    • http://adminhalil.com/44301979519j4elv.pdfIn PDF document text
    • http://lestyprin.online/exponential_decay_practice_worksheet_answersuz300.pdfIn PDF document text
    • https://nujalujuxak.weebly.com/uploads/1/3/5/3/135347358/ribasid_relimemirumop_xugogefi.pdfIn PDF document text
    • http://dressnbuy.com/878013857096ef21.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/lesadisizasixud_dupuxozut_dukizale.pdfIn PDF document text
    • https://zedurobarudavur.weebly.com/uploads/1/3/4/0/134018347/3a0279d1619.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/is_nesquik_strawberry_milk_good_for_youtoi8e.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
    • http://kojuvurapamox.myartsonline.com/athabasca_alistair_maclean.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 4860 bytes
SHA-256: ce1f6f6c7460867c0ae6b7624b375a5565ff3288e09cd47a07c7d607de567a5f
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 14204 bytes
SHA-256: 49f4a21fd644dc016a30e80067413a3b9ac1a5c0759baedd1a76ce6e49a1a7a2
font_02_sfnt_off0001292d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292D 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_03_sfnt_off00013d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D96 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333