Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e4915a1017d5ad…

MALICIOUS

PDF

76.0 KB Created: 2021-04-06 13:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4684bbb182e5cb0417eefe1aeda7d9b3 SHA-1: 947808788b17132640e2da0f9a03f1df03e875cf SHA-256: e8e4915a1017d5adf4b879b4a0eedf8f467df864952141f4287743e93ecef386
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 0.9993

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://resalured.ru/123?utm_term=articulaciones+del+cuerpo+humano+pdf PDF link annotation
    • http://kneeksi.ru/good_kid_maad_city_free_album_downlooafde.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/7156559.pdfIn PDF document text
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/3809289.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/79ebf0d50.pdfIn PDF document text
    • http://abreudesigns.com/zopujedixixelogusvjv7.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/solamente_tu_pablo_alborann02qq.pdfIn PDF document text
    • http://biraxubidu.22web.org/gesiz.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/desh_bhakti_all_ringtone_free5d3ho.pdfIn PDF document text
    • http://maska-respirator.com/day_by_day_organizer_apk3q7ee.pdfIn PDF document text
    • http://pl50off.info/warren_buffett_way_audiobooke99mz.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/girot.pdfIn PDF document text
    • http://xevivaxipime.22web.org/29626452450.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/170325.pdfIn PDF document text
    • http://senteber.site/902805019348r44c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kilirafesiva.epizy.com/45230259549.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/dunkin_donuts_matcha_latte_carbs.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/endocarditis_bacteriana_aguda.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/how_much_does_your_permit_cost_in_ny.pdfIn PDF document text
    • http://nojimaduxonariz.rf.gd/gitezuzeg.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/gipimajofevuwirozazi.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/ibs_nhs_diet_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2055da50-dd04-4d87-9ef9-5b2deec192ee/letifexokajevoxofuxupari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9424e00e-d1fb-4bea-8ff3-1a3b1624686d/what_are_some_examples_of_autobiography.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
    • https://medlineplus.gov/spanish/bonesjointsandmuscles.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 5384 bytes
SHA-256: 138d6d4992d57560f12c1078728891544aef7bf08abe26fa9ed06a3bdd229cbd
font_01_sfnt_off0000fd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 11176 bytes
SHA-256: ceb4386fd98e2cbe18f0381c3765214add9463aa9e252bd9805885df57c4bb0a

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