Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6e0ddcdbd23447…

MALICIOUS

PDF

85.7 KB Created: 2021-06-10 17:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0bc769921dfded85186f6220863b5e86 SHA-1: ab06f0f7fe76d56ac9c10d6a1fbfb52a0422a6e3 SHA-256: 5e6e0ddcdbd23447f0ee90c60e5909c347c572ef339256ac03b6536686ba8f6a
186 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 6

  • 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.
  • 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://pistant.ru/pbw?utm_term=cracking+the+sat+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383804/normal_604c9ed957ed2.pdfIn PDF document text
    • https://guvavibigedufos.weebly.com/uploads/1/3/4/8/134855984/lotelaful.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368985/normal_5fe2bf4aaa6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_603e77a215e3e.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/0892e40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_60540303c0ac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_603c712a63ce1.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/pepepasa.pdfIn PDF document text
    • https://wededizopi.weebly.com/uploads/1/3/3/9/133986349/xevanolo_kiburebebumegov_pukulu.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/zakatuduxiva_vipuwebopu_luxanepujavox_joguz.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/xukigafewavin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lilofebuful.pbworks.com/w/file/fetch/144951114/65916590293.pdfIn PDF document text
    • http://palejemevat.pbworks.com/f/56676618086.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/avaya_site_administration_basic_commands.pdfIn PDF document text
    • http://kibarilotog.pbworks.com/w/file/fetch/144982275/nuwaloro.pdfIn PDF document text
    • http://rupebaxo.pbworks.com/w/file/fetch/144529089/ventajas_y_desventajas_de_las_redes_sociales_en_los_adolescentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a698268-fa6e-4702-830f-97079fb24ea6/brian_tracy_eat_that_frog_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68cde5d-292a-4158-be56-59e836ff6467/bupesibu.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_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 5628 bytes
SHA-256: 168fd1aa4cdbcb82dde3db915c8da3604abbf238755ff0058a6e9e9da257aadd
font_01_sfnt_off0001259b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259B 10668 bytes
SHA-256: 373670b0d4ce4b8fdb637e832946c0d6224f765dd259aad36b4f01195be6bd63

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