Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e76350a1832ac7…

MALICIOUS

PDF

82.3 KB Created: 2021-03-22 02:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67cff7f857f39c1f3ea41f9eb88c15fc SHA-1: fa8dcb81ef77960ca6fa9b7f02df2d062a3cd086 SHA-256: 20e76350a1832ac789a771cf35d970f93d0fcbb957853177279f1756c810af5d
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 0.9998

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 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://xajibur.ru/123?utm_term=avconv+vs+ffmpeg+performance PDF link annotation
    • http://alternativeinfluencenetwork.net/freemason_interview_questions_and_answers6sewx.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/d067313.pdfIn PDF document text
    • https://feveronibamuja.weebly.com/uploads/1/3/5/3/135300243/7145293.pdfIn PDF document text
    • http://lnstagramcentre.net/application_letter_for_job_applyfi8e7.pdfIn PDF document text
    • https://gewilowada.weebly.com/uploads/1/3/0/7/130776716/3f42c46b56eceb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_600e3e7cc93eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_60570c6aac154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_5fd9a60340f49.pdfIn PDF document text
    • http://cetapp.xyz/how_to_connect_blueant_headphonesub97y.pdfIn PDF document text
    • http://lighterusb24.site/couples_dress_up_games_onlineutc5u.pdfIn PDF document text
    • https://mivebomuponi.weebly.com/uploads/1/3/1/3/131398008/pirijaxijopumetelo.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://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_8651a87e1c734247866c0ef8299806d1.pdf?index=trueIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_bb7f1914d7994bea9745fa1436cd68c3.pdf?index=trueIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_af9dc9fccfb34434babbce137f6d22a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/a_i_g_police_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/13397318346.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_6cbacbf4beca431389bbf6a2dbb5d0c9.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_bd3b9ae820db4093868b6d8b46cc07c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/lagu_lily_dj_soda.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_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 5012 bytes
SHA-256: 07f8b6458f2c19faac55639c593ddc11219afd824d01cec3ce8a99f7fb1afc2f
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 11864 bytes
SHA-256: d68a4a0aee42b31e7623a491cb1ea3a64c2c9dd6339610af94f64fd6c2f33e6e
font_02_sfnt_off00012de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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