Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb706c60c52c08b9…

MALICIOUS

PDF

62.4 KB Created: 2020-11-18 12:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7599d489e959c5a1b3c8358917d77455 SHA-1: d12f3dcf85d7453887b52ea7cd0cf20cffdd1ce7 SHA-256: cb706c60c52c08b9a2303b1ea666b6ce4eaa8561eb56735b8b94b41ade6f9232
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 0.9994

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 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://traffking.ru/strik?utm_term=pistis+sophia+d PDF link annotation
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/samesuseliju.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/85a50252-c8cb-4fd3-896a-c9ea1963bc1f/92579807420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5c57f8-b23f-4537-903e-f573e5ada998/7_days_to_die_launcher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b47fb1-998c-4f3c-9374-cfdf1095cffa/besinenapikizuwixirefixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a14f28-1ba2-4912-b688-c3694673b040/nujevopopelogevusexeze.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/nawujotoviropajorofa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/cours_barycentre_seconde_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b90c682-9d97-429c-bd1f-d6a95c0243fa/interaction_design_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636e0df0-1312-46cf-8ba5-cb2a758f68a2/manual_of_museum_exhibitions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9f2feb-0238-465c-8b50-c0f489d22cdf/ron_clark_shamika_wallace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84681d9-fca2-494f-844a-14474680dd53/cube_escape_case_23_chapter_4.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_off0000ae08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE08 4484 bytes
SHA-256: a218b1981c9cf86fe42614ece95de16b037e3e5237ae643cf9590c6d3963bc41
font_01_sfnt_off0000bd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3C 9496 bytes
SHA-256: 78d65feb245faf14929073a93a16004bc94429de9bccf0b4b58ac5377be7f636
font_02_sfnt_off0000ddcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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