Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d26e147374f4b1b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-01 22:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ebec1d4638f1eca4a6a52624f0e9b42c SHA-1: 54c2489ef9079932e1903e878cae972ef38ce7d4 SHA-256: 3d26e147374f4b1bbef5e808755119b5198d785cfa59f577f4378ad93a3adb0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/aws?utm_term=can+you+rekey+a+schlage+connect+lock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5ffe2d75dc8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_5fe6b0ba5e4f1.pdfIn PDF document text
    • http://puxasazinatuve.iblogger.org/their_eyes_were_watching_god_summary_and_analysis.pdfIn PDF document text
    • http://store50off.info/myles_munroe_childrenifio8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_603bf9a9bb353.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/918319656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460709/normal_6009b57513538.pdfIn PDF document text
    • http://nikepexi.22web.org/avery_dennison_labels_templates.pdfIn PDF document text
    • http://vuzosemeve.22web.org/86705528583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_600f1a1762f0c.pdfIn PDF document text
    • http://sofofetaletome.22web.org/netidete.pdfIn PDF document text
    • http://avbox.org/52474259933vk8gn.pdfIn PDF document text
    • http://mexicotop.xyz/lyndall_urwick_proceso_administrativobke60.pdfIn PDF document text
    • http://patutejugivipi.iblogger.org/whatsapp_video_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodireso.epizy.com/1014031587.pdfIn PDF document text
    • http://bavubuseji.epizy.com/54391570619.pdfIn PDF document text
    • http://nimetegukixiz.rf.gd/18391144047.pdfIn PDF document text
    • http://nazedizabif.rf.gd/39685873974.pdfIn PDF document text
    • http://wererivukij.epizy.com/kavatosozasopogi.pdfIn PDF document text
    • http://tafisazovelowu.rf.gd/carl_sagan_contact_book.pdfIn PDF document text
    • http://xixakoju.rf.gd/cashew_nut_health_benefits.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_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5132 bytes
SHA-256: 54bf2858df7900c2fc9c4a87b93ec2ff80291387e674061c70a6e60832bee0d2
font_01_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 10560 bytes
SHA-256: 71a2a929c4fd59f92aa8efa21dbb17fd2de87506ed51649253d6a09e43a4cfe0

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