Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3f8b5e216410c7…

MALICIOUS

PDF

78.2 KB Created: 2021-03-29 05:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e79fbd4062ee73d02ccaf637ef5d531 SHA-1: 92802225951ee23cfb1b2de7081aab7889b2ea50 SHA-256: 3b3f8b5e216410c79fce03d6d6a7156a607f72ed971b526fc04dc924ac71efd4
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://zajinet.ru/aws?utm_term=what+is+the+best+machine+learning+course+on+coursera PDF link annotation
    • http://xasujaru.22web.org/adobe_photoshop_elements_2018_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/jfjjgji/40283998593.pdfIn PDF document text
    • https://bowemubunewoseg.weebly.com/uploads/1/3/0/7/130739536/gafene_kenubixe_walaxumukirum_kasafolojabogu.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/itWnXqf/38103370402.pdfIn PDF document text
    • https://kojazuzok.weebly.com/uploads/1/3/1/4/131438397/5634813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fd758067b6bd.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/ficiOaj/17905280360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_602b56cef2ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601b7d2f91b91.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/ieiiIjd/jivuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bupaxomu/ejemplos_de_oraciones_con_verbos_irregulares_en_pasado_simple_en_ingles.pdfIn PDF document text
    • http://kekerojuxofex.epizy.com/new_bollywood_full_movies_2019_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/19374295624.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/povefidi.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/features_of_a_newspaper_article_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/how_much_a_freelance_writer_earn_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/los_tipos_de_comunicacion_hay.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 5248 bytes
SHA-256: 3166e839a471d1eae180af548bf8dc9069de43199e648e6fb22fcfe5a9128b38
font_01_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 10512 bytes
SHA-256: 2d0bd63838893fd2c57effaa47fa667f8db564b730c13f261c321bdedd90f529
font_02_sfnt_off00011d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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