Malicious PDF — malware analysis report

Static analysis result for SHA-256 578dd95788fe3aa4…

MALICIOUS

PDF

80.0 KB Created: 2020-12-31 13:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 30bd97bf7b464dd5250148862b32814e SHA-1: 97b15318a888dfd6c66c7ad65154a577c91df1f0 SHA-256: 578dd95788fe3aa49248a1238fc12e90588b164e122856deebaafd72a3bc95d3
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 0.9998

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://trafftec.ru/strik?utm_term=amazon+photo+albums+6x4 PDF link annotation
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/d550c78e7fea4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5fa12e14a8756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f9b90106afb8.pdfIn PDF document text
    • https://papuxivosep.weebly.com/uploads/1/3/4/4/134491017/fesajoganideb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5fd3be74d7c95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e76308e-6ae6-4269-ad5c-5fb35d9fa7e8/5870376651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7a36ca-23d0-44f0-b936-fe54dfd34366/kilabusizafi.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/azure_sql_server_alwayson_cluster_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf74573-3ba0-4406-84c0-9263d37a5691/kiminejonosusivakumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5e19ef-d56a-40dd-92d3-c723051ea240/casio_protrek_manual_3443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a7431b-46a8-41da-90ff-dd9120326087/minecraft_daylight_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdabdd0-a3a3-48e3-a7e1-5d601ae5aa4d/kanto_yu6_vs_klipsch_r-_51pm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12af8e2-3d29-4662-9667-c7799f78235e/2018_rav4_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a6e21f-daa5-495a-b5bd-57892154310e/rapegavewapibulowasumoxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123d1189-26a7-45c9-941a-bf087ef46557/spider_solitaire_online_free_no_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2bca8b-08da-4274-be2f-511607dd0e15/xuxeloxuxemojamiso.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/skinnytaste_chicken_fajitas_sheet_pan.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 5452 bytes
SHA-256: addb539b8dfe7271567997a5923aa86761dee47789bd1824444aa3f0c253f787
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 10580 bytes
SHA-256: 9b5c4f94984d2a2de5173f305dfda6f41b0f6ceea9150ec06261c1e26bfbec36

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