Malicious PDF — malware analysis report

Static analysis result for SHA-256 665b89832c6f0018…

MALICIOUS

PDF

72.8 KB Created: 2021-03-05 07:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 55386428cc8b5f5bd5862613cffb280e SHA-1: f002e88377e39bc57af1ccc71735976346b26362 SHA-256: 665b89832c6f00185bd0bdf4153b363a31a0accb6b6f8d920684a055ab64d0d7
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=alone+together+online+escape+room+hints In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368229/normal_6007595b02585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_60119722d5225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5fc86e1b0bdf9.pdfIn PDF document text
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/rikutuwilomezu-mufawatenerevan-luzexuzepofu-wedurogoke.pdfIn PDF document text
    • https://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/38b148.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/filakuliwudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_603d3b92480fb.pdfIn PDF document text
    • http://dududuw.mypressonline.com/leparoxobupotuwojuko.pdfIn PDF document text
    • https://rereviraret.weebly.com/uploads/1/3/4/5/134512362/nefebav_ponomofev_nutobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fcf4c2b08889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_601185f2d6970.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_075fd053faa7435bba4cd71ea962a9b4.pdf?index=trueIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_5c502aa736f847b98d6ca125f7fd6a24.pdf?index=trueIn PDF document text
    • http://rewuwuja.onlinewebshop.net/mowisubitukogi.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/skype_for_business_desktop_client.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/civilization_iv_beyond_the_sword_strategy_guide.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_c6eaeaf32b70408fb1ebef240cc80952.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/vobepobune.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 5336 bytes
SHA-256: 69b0f0a2b7a2ee743065304d94d3cc0da2d98f99e33e17fc026bf5af5ebfcbc9
font_01_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 10320 bytes
SHA-256: 77c38abd5e896ff0d4dc3ce5e7909b15077518b633ae5092ce89c148ea5087d1

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