Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4849c1c54efe7b…

MALICIOUS

PDF

67.3 KB Created: 2021-02-13 17:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 350b8cd394a43ab620fb992404ced86a SHA-1: d2727f616bea1bf9d3c3e54c9dc0b4bb1ab34a9f SHA-256: 7a4849c1c54efe7b679960dbd94e7c8f6d5eb742d01134a9c8e7f1da435a6d31
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://jacksth.ru/wb?keyword=vrischika%20rashi%202019%20telugu%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5feb5d9740bf9.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/71bf4d8f3ae9808.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/d8788e8f120a19.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/d5b7ea9e0dbf6c.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/jobufubemerovi.pdfIn PDF document text
    • http://indohealth365.online/systematic_sampling_questions_and_answers2bh9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fe6331a5988f.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/505ab54b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_600d015c5b482.pdfIn PDF document text
    • http://lidlid.xyz/1862340772xhn90.pdfIn PDF document text
    • https://bogogumufen.weebly.com/uploads/1/3/4/0/134018830/ruvuboxize.pdfIn PDF document text
    • http://jazesenebadajak.iblogger.org/template_strings_appendchild.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/animusic_stick_figures_sheet_musiciql1k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosoveta.rf.gd/72292685686.pdfIn PDF document text
    • http://puwolir.epizy.com/tunejajagipotugom.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_off0000c832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC832 5928 bytes
SHA-256: 48f4dc6e1e423242c8879ac5f412b2666948fbc81e1ef72a11c6f2da66c34a77
font_01_sfnt_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 10536 bytes
SHA-256: ef6b3d5836475943965af8bd41fc6d78c9c8b9f15b1aaf480096de81dae26ae2