Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c2ae5cd251b9ad…

MALICIOUS

PDF

69.4 KB Created: 2021-03-23 06:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 99e7d6ef0e682e791d6b00c60388e977 SHA-1: d8b66c194e6986d30e05f2f5b39d49e999c47720 SHA-256: 54c2ae5cd251b9ad30db6e8639c4ded4c9979df2808b8e971bd6d982a15985f5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one pointing to zajinet.ru, suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary function is to redirect users to numerous external URLs, potentially for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://zajinet.ru/wix?keyword=frontier+middle+school+wentzville PDF link annotation
    • http://myirn.icu/home_design_3d_paid_by_uu70bue.pdfIn PDF document text
    • http://erogan-encolumbia.site/jefibemigucz19o.pdfIn PDF document text
    • http://motivawka.online/napemixofuvx78jd.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/beach_buggy_racing_2_unblockedzib6f.pdfIn PDF document text
    • http://sakhavto.ru/elementos_representativos_de_la_tabla_periodica_definicionblopl.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/garmin_g600_manual1ixfb.pdfIn PDF document text
    • http://meriline.store/bullet_basya_film_songzyt11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/clep_exams_study_guides_free.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/abdominopelvic_regions_and_quadrants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168dc4a1-502f-4500-b099-72833d91f63d/30383430996.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_78b1f6f0f2cc450182a555dfc5d8e24b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neviwove/carrara_oval_stadium_pitch_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58bde64-e814-4490-9a4d-6227a96ea518/41851766696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01821ce2-5860-463d-b52d-be4b231131e5/modo_de_produccion_economia_primitiva.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_d97fa60eabf94bd6859a366463a3fbe1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/aadhar_card_by_name_and_dob.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/mbbs_bds_bams_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43aef4d-6356-4d40-848b-8c28c80a69c4/lukozazos.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_ee3254423c764bba92e9f09fbdfbee97.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_8c3c7cef427d4db9a04a14ae4454c225.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CC 5128 bytes
SHA-256: 2cb9d63cdb3a5785fcd6206e5b4b564aa098089639c61004aded235b9dc8500a
font_01_sfnt_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 10624 bytes
SHA-256: de75991bffd152e1109849f722b38a71e8bb04f2289210845ebe1b963ba14c9f

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