Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eec9a27c4a10094…

MALICIOUS

PDF

78.3 KB Created: 2020-11-24 06:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be76e38f67fc3bdcc5f14b3d7a65d123 SHA-1: bd8f2014968daefce1261d1d9919c8517e49d067 SHA-256: 2eec9a27c4a100949616639d137f24c8ed956d1ee7bdbf3a71e2bdcbe29591c6
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 0.9998

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://trafffi.ru/123?utm_term=kick+return+2+poki PDF link annotation
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/384697.pdfIn PDF document text
    • https://waseralubireg.weebly.com/uploads/1/3/4/6/134622629/vefijurisiwawa.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/2126607.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/fawafoxatetuwej_duradozu_jixuxekum_rejejiwonupoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f92b3f2138f5.pdfIn PDF document text
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/26d7e18bf.pdfIn PDF document text
    • https://lawamikakemudi.weebly.com/uploads/1/3/4/4/134477295/20be8f8aa6.pdfIn PDF document text
    • https://sowuritujozefa.weebly.com/uploads/1/3/4/6/134621612/senitidojorizux.pdfIn PDF document text
    • https://zewonawexekuke.weebly.com/uploads/1/3/4/3/134318694/vodipafit-mogaro-puferaluwoneta-pexakusep.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/ca663766.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/vonusirukete/bhutan_travel_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/font_used_on_bank_of_america_statements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5575cab5-ae4b-4492-be98-46428cfe940b/taxonomia_de_bloom_y_marzano.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/poniwulibukew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d72b8d1-620a-4435-9485-2ed240a3e402/594666327.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/chrome_dark_mode_android_oreo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE643 4040 bytes
SHA-256: 2a0fca9427932015ebc6fe766f84c2835c825b060cd9d28044b901f356a2fa36
font_01_sfnt_off0000f487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF487 4672 bytes
SHA-256: 2d5aa7ca36855176cb1673031ebc2ab36f78ecbc911b69bed3c3e974ba25122d
font_02_sfnt_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 11876 bytes
SHA-256: 13eecdeee34ff3fc7be1a7c5077cc3b59ec1ff3b025b19c5e5e6ec4accaaf35b

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