Malicious PDF — malware analysis report

Static analysis result for SHA-256 32847feeafdbcdff…

MALICIOUS

PDF

73.0 KB Created: 2021-02-20 14:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d3c840c8a9237729893f1b24db736b30 SHA-1: b9cda551c7f9aca0bd46ce29be7ab2622634bc62 SHA-256: 32847feeafdbcdff27c737ba5bf34f686e1f828f7d06df3dc7f5ad627ab488f5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious content designed to redirect users to potentially harmful sites.

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://maypoin.ru/123?utm_term=dell+poweredge+2950+server+manual PDF link annotation
    • https://cdn.sqhk.co/ronizimat/aXiexik/emergency_room_wait_times_by_country.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/qfVgigC/fish_hook_remover_pro_reviews.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/5889193.pdfIn PDF document text
    • https://zuxidonav.weebly.com/uploads/1/3/4/8/134867872/828190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5ff7a3c195353.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/haEgchj/80097268539.pdfIn PDF document text
    • https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/munopilifi_fuzalinex_rowuxesewepela_zarejox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601e8cf575047.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/chfSNxx/4k_wallpaper_gaming_mobile_legends.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_601bfb6f0f76b.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/jTB8Khe/runescape_steam_link.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/b5ac6f4.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/silaseje.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/ig9bgga/funny_sms_hd_ringtone_baby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6027f7111abef.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/6281833.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/jamupok-wenebixinose-gemepegid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 5984 bytes
SHA-256: 3d1e40fafd53129cab03f774c9f213c16b954c35abe76100bebc51f223942298
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 11188 bytes
SHA-256: 44f5fd089d9cf86d6ffc443b43dd4f26e4dac1f1ce92b60438680b2b242628f6

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