Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf924cafa33c31f…

MALICIOUS

PDF

96.7 KB Created: 2021-02-23 22:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1562cfae7c6f2ba8ed3b86d8796e42bc SHA-1: eb1cb96d224795a5a1185afc132724d1f73dec9e SHA-256: fdf924cafa33c31f5e783f41ffd729032527a312159f77221e11cab2a135623d
126 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=service+oriented+architecture+%2528soa%2529+for+dummies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370089/normal_602ef3583dee5.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/13c37.pdfIn PDF document text
    • http://moymagazin.xyz/74714491649mb421.pdfIn PDF document text
    • https://gujijuxe.weebly.com/uploads/1/3/5/3/135326775/kuwef.pdfIn PDF document text
    • http://investmag.org/how_many_cc_is_5hpdufgq.pdfIn PDF document text
    • https://nogenovone.weebly.com/uploads/1/3/4/7/134745979/tafavi.pdfIn PDF document text
    • http://yachts-4-sale.com/guvedafopo2x671.pdfIn PDF document text
    • https://xudapunazegiwav.weebly.com/uploads/1/3/2/7/132741045/66ce7ba894b58.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/zarixuniwoxa9wvgi.pdfIn PDF document text
    • http://naturaleone.space/32566721853iz2t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_6014d15481f37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5fccb667a7c51.pdfIn PDF document text
    • http://diwolekeku.22web.org/how_to_change_battery_in_3m_filtrete_thermostat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_600c238aeb0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_6022e614556bb.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
    • http://kejidexod.epizy.com/sumomozik.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/a_plague_tale_innocence_pc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 4856 bytes
SHA-256: 65995b5c8a5f46e905929b8868a835619904f5e5840ed38a503972a0e4ba8e93
font_01_sfnt_off00012cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF0 5428 bytes
SHA-256: 06ae55279e77c561312bdcd63fd4aea1d77e2ef54281b9bbb8421a0cc92b81db
font_02_sfnt_off00013f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F41 10920 bytes
SHA-256: 1a34dc1d282970a31fca63ffd422ebaca43b3d27e6565f1ff015785b1e5f8dda
font_03_sfnt_off000164a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A4 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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