Malicious PDF — malware analysis report

Static analysis result for SHA-256 99266610ef7b477e…

MALICIOUS

PDF

72.9 KB Created: 2021-05-23 09:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 08dc8b20437a59f520afdd7e079f6bbe SHA-1: b65eb57206f83f8c7ad41a10033a57bb3f9197cc SHA-256: 99266610ef7b477eb94194df59f6707be23b1d3b7d4b5f343e234a32c7532c96
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://jumiwimov.ru/strik?utm_term=intex+2500+pool+pump+timer+instructions PDF link annotation
    • https://sifapovidajep.weebly.com/uploads/1/3/0/7/130738911/7569360.pdfIn PDF document text
    • https://munojafejim.weebly.com/uploads/1/3/0/8/130874523/zugavenof.pdfIn PDF document text
    • https://femezusuf.weebly.com/uploads/1/3/1/6/131606597/3185641.pdfIn PDF document text
    • https://xagegebalelil.weebly.com/uploads/1/3/4/5/134579129/gokajuvigo.pdfIn PDF document text
    • https://sopetenoredu.weebly.com/uploads/1/3/5/3/135318191/9707438.pdfIn PDF document text
    • https://gopojobazisedi.weebly.com/uploads/1/3/1/4/131436977/7502442.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/5938844.pdfIn PDF document text
    • https://mivagori.weebly.com/uploads/1/3/5/3/135318233/zesebawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_603599d7bf578.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/e3e8faf3634de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481271/normal_60369e73ea92c.pdfIn PDF document text
    • https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/5996442.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/tolivajupeku/luwukokaxal.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/11210023412.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/20623916934.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/mekibokuwemuvopubezitowim.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/dcs-5020l_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/taylor_ice_cream_machine_for_sale_in_durban.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/bumper._io_apk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 5272 bytes
SHA-256: f73dcbce2ba7ddaa28d34f7c4b4ba3e21c8470230604fd2c8c972d5005f050ed
font_01_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 12224 bytes
SHA-256: 2da94159ff4bb03d2a79d0f801ba0815fd41ea3e99bce51da5a6df909258d9c1

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