Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2e88fc87837cff…

MALICIOUS

PDF

78.9 KB Created: 2021-03-16 16:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 93e4e27a7256f1aa4fb6de6cf63aac8d SHA-1: 8311de7a48d9071c0b8b698001f232c9c9fd38e2 SHA-256: bd2e88fc87837cff7279efc841cea22706458e50a0f0f4b4a88cd92de019a60f
156 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 0.9991

Heuristics 5

  • 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.
  • 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://ponafet.ru/123?utm_term=mitosis+flip+book+diagram+masters+answers PDF link annotation
    • https://niwarixetawozav.weebly.com/uploads/1/3/4/1/134108921/024b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_60000fbd84d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_601ad683a6371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5fef668a2e0b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5fec136cd923a.pdfIn PDF document text
    • https://luzijegeze.weebly.com/uploads/1/3/4/0/134040843/7749213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_6031820ab9b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425912/normal_5fd1193622b3d.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/femixoted.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_604aea17567ea.pdfIn PDF document text
    • https://wugedelujexot.weebly.com/uploads/1/3/1/4/131456191/d8309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_60089b9bad8a6.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/fenapeketupima.pdfIn PDF document text
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/7be57da72f9.pdfIn PDF document text
    • https://ruginimurixibiz.weebly.com/uploads/1/3/1/6/131606491/9546e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401994/normal_603dee4025fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_603909583f277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_e650196efbcf4785935d8de517b8e77e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/do_any_polar_bears_live_in_antarctica.pdfIn PDF document text
    • http://sewemira.atwebpages.com/ielts_speaking_practice_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/what_do_4kt_stand_for.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_fc07120429de4a62bf6848d19bb09644.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_9a9fd7e3c1e649a69595a8a9e4f2675f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 5452 bytes
SHA-256: d5f1ed16a58bccfbbc624f1583ce0098c948621cbb259da75ba5452e1b879b62
font_01_sfnt_off0000fb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0B 10872 bytes
SHA-256: 7f2395e5982547dc5ddc5fdb664101b3b954984a7eb1aa85f7765fd3fafdc0fe
font_02_sfnt_off00011f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F94 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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