Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d618fb9010da1f…

MALICIOUS

PDF

87.0 KB Created: 2021-03-26 03:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0332f7b62f5f8d95db926e5a89c2d37b SHA-1: e0c08ace465a061ac2482b2332a79797680cbf4c SHA-256: 89d618fb9010da1fce094dffa14607c96ee5716417461ffc08bb8716940065c8
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file utilizes a lure related to 'pain assessment nursing pdf' to trick users into clicking a link. This link, identified as a redirector, leads to a phishing domain. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/award?keyword=pain+assessment+nursing+pdf PDF link annotation
    • http://helplnstagram-confirm.com/barnett_vortex_youth_compound_bow4q7we.pdfIn PDF document text
    • http://tertov.xyz/pakexabuwelifepu4j1j2.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/ifhfwjd/34969639651.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/9jiiigj/pokose.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/LTjfohb/acumed_distal_radius_technique_guide.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/vumikiruzena.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/reading_comprehension_for_bank.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/ehL2Pjg/11475833654.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://uploads.strikinglycdn.com/files/258ddb54-8405-43ad-92c2-6b8867f5182a/bunezugetiravabum.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/apache_nifi_1._7._1.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/the_secrets_we_keep_movie_where_to_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/big_easy_turkey_fryer_chicken_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/bibliographic_data_in_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/axis_mf_online_redemption_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/tilukukomomevuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7e4d30-23a5-4334-b99d-b598cf52a857/creative_writing_prompts_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/weekly_tax_table_2017_excel_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42274bed-cecd-45b5-8363-161bc4f45303/zijipomekujosivobuvuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/biblical_counseling.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/52421369584.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A91 5104 bytes
SHA-256: 3ce34ae62611151dc90fca7e48222657f5a3429a5d98bd93d8d3f2801a6c674d
font_01_sfnt_off00011bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCA 10860 bytes
SHA-256: b0e67cb2bace8c4047301e1f6f40828b7cb39c565457d9becb67ddeec9a1cf45
font_02_sfnt_off000140a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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