Malicious PDF — malware analysis report

Static analysis result for SHA-256 099f3a98dcc64e34…

MALICIOUS

PDF

72.0 KB Created: 2021-02-13 21:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2affdc85a31bcf0773e889bd29294cd3 SHA-1: ff0ea2ecd9bde8c3f8f86b56ef51665cd1d1c1d1 SHA-256: 099f3a98dcc64e3445b0bbcf134d146a46f645b8194bfb49171e7a80c3d6fe2f
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=yowhatsapp%20anti%20ban%202 PDF link annotation
    • https://fefojaza.weebly.com/uploads/1/3/4/4/134480993/fedijivip.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/tagirerogupuga.pdfIn PDF document text
    • http://docita.fun/business_administration_degree_salaryheshl.pdfIn PDF document text
    • https://wegoboxup.weebly.com/uploads/1/3/4/7/134772399/9076951.pdfIn PDF document text
    • https://buzowupe.weebly.com/uploads/1/3/1/4/131483044/tulozejejed-zexifakumej-puxenomudimebij-luliburakezator.pdfIn PDF document text
    • http://greatholl.com/56995054021rmyd9.pdfIn PDF document text
    • http://hargotel.xyz/20463238947dqkgj.pdfIn PDF document text
    • http://avtovishki-msk.ru/vce_exam_simulator_2._6._1_crackai1ok.pdfIn PDF document text
    • http://iclod.tech/34138637865eivwz.pdfIn PDF document text
    • http://biweekamnf.com/16409105738cb4us.pdfIn PDF document text
    • https://pekamadepo.weebly.com/uploads/1/3/4/3/134321673/rejixapenetuni.pdfIn PDF document text
    • https://vidisuxusa.weebly.com/uploads/1/3/1/6/131606291/gaxokabuditinuk_visatusode_fewij_lexeroga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_600a1f62bade1.pdfIn PDF document text
    • https://bokakuvuzojoji.weebly.com/uploads/1/3/4/3/134351808/3688246.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/7777858.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/dutuzanob/aaron_sorkin_masterclass_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/73879974962.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/rexuropogovupol.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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 5104 bytes
SHA-256: ae92a763c58ecae213c8efa0d3c0874dc37dedc0bd521e9b66c21a29d3bf44ee
font_01_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 10708 bytes
SHA-256: fa736150b1f7b98fbcfb199278b76e82cf2e5bf26ab756261cfc98f6b212cfc8

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