Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa165452e2e6162f…

MALICIOUS

PDF

71.7 KB Created: 2021-02-27 10:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b7ef8ebb080b51f3ef9b977e9f6033d0 SHA-1: 0b7231db1bbc81ba6aa933e081573de2b32f623e SHA-256: aa165452e2e6162f082b066b013070996150446ea7e5c01875b3b3e98e0de8d7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/award?keyword=what+is+rm+manager+in+wipro PDF link annotation
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/ed3ab.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/zajasiximo_fasusebofux_dafivopupe_repivoxokowibiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_5fd8d0fa145c7.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/b6ee698ed991d.pdfIn PDF document text
    • http://romeita.space/flower_un_amor_intensowj8kh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_5ffb5c582d40c.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/pofugikakata_lenokanunuwudus_vatavojake.pdfIn PDF document text
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/vinagevaxibi.pdfIn PDF document text
    • https://tegomufowake.weebly.com/uploads/1/3/5/9/135958876/1613378.pdfIn PDF document text
    • http://investmag.org/21364314361qpezs.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/playboy_april_2002zybzm.pdfIn PDF document text
    • https://kavikazu.weebly.com/uploads/1/3/5/3/135392310/ccb2a45.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/d5hjJrv/45853893112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/mufotobojigupe.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/sharepoint_2010_user_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC899 5308 bytes
SHA-256: 5e57c1e34a485de0dbb183a60556102e26130147faff5e9bad325993dd6f21fb
font_01_sfnt_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 9744 bytes
SHA-256: 4f359f8744f97dd8b7de30e292b00e2acc7bbebf9e06e821571512ea6ed440d9
font_02_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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