Malicious PDF — malware analysis report

Static analysis result for SHA-256 591bd1dffb687949…

MALICIOUS

PDF

66.8 KB Created: 2021-02-15 06:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4359015a4f874fce63862b65e0b7e115 SHA-1: 86191e539f8bbd0174d5211b2e506fa509072890 SHA-256: 591bd1dffb687949638a7ab559a138cab59d6f187b91acfbc21a56b18d261c2c
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://baarspo.ru/wix?keyword=fat+mo%2527s+murfreesboro+menu PDF link annotation
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/tarawutukebid_nifiz_bezipanaru.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/tizaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373992/normal_5fc5a11f62438.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/ba65830b7317.pdfIn PDF document text
    • https://pimesawugure.weebly.com/uploads/1/3/0/7/130776266/buwewuwusasowetijop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_601596dccd8d7.pdfIn PDF document text
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/206027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_601bcc1cd11a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_601e56e45cb09.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/fa964e1d69ebd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_6026c859d1cfa.pdfIn PDF document text
    • http://lopozodedawap.22web.org/limopu.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/6a6e2f9fe5979.pdfIn PDF document text
    • http://nujiwuwuxazasu.iblogger.org/houghton_mifflin_harcourt_geometry_worksheet_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafaloputazesoj.rf.gd/aha_bls_card_template.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_off0000ca13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 5008 bytes
SHA-256: 4d446f58a576f3974cc0df9f87ac3d80e188e1f55148dbbcd6ed5e5fbc08ea42
font_01_sfnt_off0000db0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0C 10312 bytes
SHA-256: 2b2668722a902b60214ca05631e9ce119033ace3dfd9857576bbbcf63c4c7fc6