Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a2db018254973d…

MALICIOUS

PDF

76.0 KB Created: 2021-05-10 10:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 85f49f6f8af18185aabf1bc0e2ed881e SHA-1: da4f941932f250ee2b90c6b762897678b085884b SHA-256: 82a2db018254973decfe3cb71e1d87b8ca1908aff6e2f6b1e70dad7e8fb9b055
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-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.
  • 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://xezojetit.ru/strik?utm_term=how+old+is+my+armstrong+furnace PDF link annotation
    • http://megatorg.ru/29619415571214ix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_6065c423247d0.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/8955102.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/gajajegemared_wogifagixol_zosoduposi.pdfIn PDF document text
    • http://sarkife.site/tirutetbbg2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506131/normal_5fe464b18aa92.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/5124157.pdfIn PDF document text
    • https://bitipares.weebly.com/uploads/1/3/1/3/131379103/gemikebes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_601bde29b4479.pdfIn PDF document text
    • http://blaugrana.ru/92349544790pcei7.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/8264690.pdfIn PDF document text
    • https://bipokedofep.weebly.com/uploads/1/3/5/3/135322207/wudozafelodupaja.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/c2592b8e0bf.pdfIn PDF document text
    • http://onlyforyou.space/javascript_tutorial_tutorialspoint8qq2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_5fe756750c9dc.pdfIn PDF document text
    • http://pmaider.com/canal_rcn_en_vivo_chaty_tvi130f.pdfIn PDF document text
    • https://lapulefad.weebly.com/uploads/1/3/2/8/132815180/6fada93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lopeteb/demonstrative_adjectives_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/mazijivutuzuriva.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/satakimiruxoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/nututegiwuxov.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_927796f2b75144d4aafc5b35762682a7.pdf?index=trueIn PDF document text
    • https://4c38db24-2924-4bf2-81c9-04860d987a69.filesusr.com/ugd/a68d8f_0803d544c13e49b9a40390d315c513ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fezenur/81431447979.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_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 5496 bytes
SHA-256: 5719a385050dfc4b5c90293bc79cd6e88413021727d99343b7520df0421e3ac8
font_01_sfnt_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 10604 bytes
SHA-256: 2d319eb1cbc82e9bb42b2ba1aa816f8d9fc0210fb575e2ffd3a1118be6cd9996

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