Malicious PDF — malware analysis report

Static analysis result for SHA-256 805adfe09be0b275…

MALICIOUS

PDF

79.0 KB Created: 2021-03-09 08:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 468bdc29612698b268c32271c9432be4 SHA-1: 5d5ecea48e9b0a1faa6dfea3846631c15c2967a9 SHA-256: 805adfe09be0b275241ad0b0af13d8a014040ca5c35a51223739af082afa9ca2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=green+day+boulevard+of+broken+dreams+tab+pdf PDF link annotation
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/5013467.pdfIn PDF document text
    • http://dusamoka.mywebcommunity.org/54372783850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_600dd69ba11ef.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/b4f8f7402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415543/normal_5fde04ddaef60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ff67fe0841b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_604469834a342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_601f0c94cba20.pdfIn PDF document text
    • https://paxubemimowam.weebly.com/uploads/1/3/0/7/130739876/6537485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_601b1f45d290d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496585/normal_60037d6d5ca96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_6026f12c140ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_5ff70c7d61131.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/sig_sauer_p365_holster_owb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fc59a7d1e302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5ffe566055173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_60151e2843a8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_add614c777564797901064f970006002.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_3a6bf71c10c9448f807110ea1da547f4.pdf?index=trueIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/allen_bradley_plc_training_courses.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_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 5584 bytes
SHA-256: aaa85b808a315ad450d1f6338dd7ad379670f2cf88e331cc84fea5654a822daf
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 15180 bytes
SHA-256: b975f9970ce3146a4d5ef0c17e051433cc1e6767ac06b89e26fdab007001ad07

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