Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef2b16505de6581…

MALICIOUS

PDF

69.8 KB Created: 2021-05-19 18:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 396a595b62bc9b84eba7c5898ef5a362 SHA-1: ed9141b07ca2f379885684fed2efd29bdf015d5d SHA-256: 7ef2b16505de6581f3687e3e5f06e4cba0132373a3dc6fb434ae1a438e741f11
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 0.9996

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://zajinet.ru/strik?utm_term=vantage+precio+de+guitarra+de+los+grande PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474977/normal_603e5f2e8e8f5.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/4045632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_605f6c838d004.pdfIn PDF document text
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/7580918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_6011196db753e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_605977f5d26ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_603d1cd759d6a.pdfIn PDF document text
    • https://jedudelovaki.weebly.com/uploads/1/3/4/7/134731231/mameto_mofosowakajadex_tonamebiwovogal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_604889c5ed3a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501229/normal_60629dc32522f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_6047a73e90d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_604d3409bc289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5ff5ee2c76ff7.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/kibavutibeved/firebreather_cartoon_network_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/36875541255.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/31053015465.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/45416113729.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/fisher_and_paykel_dish_drawer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/cartesian_plane_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/kali_linux_revealed_mastering_the_penetration_testing_distribution_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/datowanazumapavunififisu.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/nowagem.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_off0000d22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 5208 bytes
SHA-256: 7858e6b27467d602c018628107ff2ab9035a76dd50adace1167b6583cf7ebb0d
font_01_sfnt_off0000e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F3 10984 bytes
SHA-256: 5307c1a976c6ddfc383c5e6bed9eef2704160900880f9e0126a83f277df817aa

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