Malicious PDF — malware analysis report

Static analysis result for SHA-256 742b9dfb7edab7e9…

MALICIOUS

PDF

77.6 KB Created: 2020-12-16 16:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2fa5b0d2f2538d3a6fddad1dd31bf1f4 SHA-1: 3e06541fb59cd40e59df8e3a6bb6170162e660ad SHA-256: 742b9dfb7edab7e9aa2521c457a991a8cdf3a85083cff8b9c387f2c54c312f45
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=better+than+revenge+lyrics PDF link annotation
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/pipiwumelada-vubim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc78103717a0f60c403be08/t/5fcc0736a87f9f1b19c517c8/1607206710321/bounce_color_complete_bundle.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/ac_city_folk_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52aa5dab-6f13-41b2-a3b7-982413361968/wukumefifenuzuduzus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cec145a8629dca752ce/1606372588578/to_kill_a_mockingbird_chapter_20_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16938398-e41e-4003-b7be-a9214cb6a446/69662469944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c289626c-dee2-4b7e-9ea0-d5be32c8bb0b/11379208833.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/92264918799.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/resultados_de_la_loteria_del_zulia_triple_a_7pm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e42471-468e-49c7-ae17-affa962ffa86/mofaw.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/sociolinguistics_journal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1ec6a371610b87670ed/1606218221343/free_disney_plus_accounts_june_2020.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 2

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_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 5272 bytes
SHA-256: 21c8b77be25761939a37b34c5b7c33d4a1482150884eca00e765fa6a89e73f60
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 10684 bytes
SHA-256: bb484dcdde99cf7e9dc8d2f2bd660f06ba3e632836dae976b7c85c14e4e9d84e

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