Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b6b9992317e886…

MALICIOUS

PDF

82.6 KB Created: 2021-03-28 01:55:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96687c67968f5dba3667cd71bd7c5832 SHA-1: edb16cd43d8563d64addf6050dd87ee5394cd6ca SHA-256: d5b6b9992317e886de15830c350757780df13082d46ab86c3fbb1c652cabf7a3
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 0.9991

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/wix?keyword=speed+and+velocity+practice+worksheet+physical+science PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482020/normal_60407344a41aa.pdfIn PDF document text
    • https://nozinogut.weebly.com/uploads/1/3/1/1/131164424/polufi.pdfIn PDF document text
    • http://golosa-spasibo.ru/1746364853522jgg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_603c6b3820d24.pdfIn PDF document text
    • http://tortomsk.ru/daxekamafoxga7oh.pdfIn PDF document text
    • http://lalat.space/masasuxudiwitakovemn9e2.pdfIn PDF document text
    • http://bonus332.site/dizajolomazonezuveznxfv3.pdfIn PDF document text
    • https://ronudinogem.weebly.com/uploads/1/3/1/3/131398573/7628196.pdfIn PDF document text
    • http://lipatajewaxo.22web.org/20024291274.pdfIn PDF document text
    • http://bazegal.iblogger.org/lic_jeevan_amar_proposal_form.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/peparoresixe.pdfIn PDF document text
    • http://nukels.xyz/kelepekixutupujukokimos6d133.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/418102461798.pdfIn PDF document text
    • http://pusosokus.iblogger.org/xetodibepuwafamuretumilos.pdfIn PDF document text
    • https://satuvimafinob.weebly.com/uploads/1/3/0/7/130739393/kulenosarub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c08989-fc03-4955-a4b8-6d7bd285d3d6/direction_test_tricks.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/linearna_algebra_i_analiticka_geometrija.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/58997587075.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/7740762817.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/56038115933.pdfIn PDF document text
    • http://nelekagudoper.rf.gd/best_star_wars_novels_ranked.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/long_division_worksheets_year_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555a6b6e-4cd6-4a56-8bb2-af1565716863/how_to_make_right_with_god.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/cdr_banner_design_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff6266d-44e8-43e9-af8f-9b595f90a01a/what_are_the_policy_models.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_off00010173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 5584 bytes
SHA-256: 3c8fdee878550a96aa48495aa17b2b0591259991c444fbcd07bd3a223ae1e669
font_01_sfnt_off00011487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11487 11052 bytes
SHA-256: 30deec64d8d10f701e8a52228cf2077530670f76311216fba56595d8c6138a8b

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