Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e8f07c0f026259…

MALICIOUS

PDF

75.7 KB Created: 2021-04-05 09:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 08a0f1ddb3caaf539275e19e63cda5f6 SHA-1: ed3df67b51bd5700314e36be6881e582a4dab422 SHA-256: 45e8f07c0f0262594a84f0a029c477690efc5eab3f3844ad8e4a6f23e39fa6e5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://xajibur.ru/strik?utm_term=what+degree+does+a+computer+systems+analyst+need PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5fdf380b9b64b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482625/normal_602a1b151da8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_60146065c936a.pdfIn PDF document text
    • http://vududodudo.22web.org/centrale_sans_xbold_free.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/vuxagixil/81579507276.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_73121401929a499a92a6f2b444e5433b.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_b8f12eea30a54d2a9aec1b4ae69f6a61.pdf?index=trueIn PDF document text
    • https://b42dfab6-8227-42c4-8fe5-fc04d9433513.filesusr.com/ugd/a9a8df_269322c790a940f68a94ca2a3e7c5324.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/kodovudowaz.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/brick_breaker_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8e3d2b-aa65-44f0-87b9-151631750e49/73550797550.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/welojemanuj.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/absolute_monarchs_worksheet.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/list_isd_codes_all_countries.pdfIn PDF document text
    • http://bikumomobopo.rf.gd/albums_app_store.pdfIn PDF document text
    • http://diroxowevigem.epizy.com/91761760619.pdfIn PDF document text
    • http://fuvovidesom.epizy.com/86694669519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033777c0-59ac-452f-95ac-c974cdc1f004/gatumigamijejan.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_39b86baeed714e2298bcab280fe0fff6.pdf?index=trueIn PDF document text
    • http://mepoketefetur.rf.gd/temitugolumapubemuv.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/46649574844.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_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5600 bytes
SHA-256: 71d4cee50c6a2fdac097690c1e870b391f7fbecf7d4dc5985e682e7dd6208c88
font_01_sfnt_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 10772 bytes
SHA-256: 6675e878a57e37a291053a8b47818633c429f4f244ff1f184c2ab625f789fe23

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