Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4f99914ca2ad62…

MALICIOUS

PDF

76.8 KB Created: 2020-12-27 11:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 648dd2b43941b529a49aedfe4489a2b4 SHA-1: 50a1a86fc0e28c2613b441938376659e1a225bdd SHA-256: dd4f99914ca2ad624d4753904ab98f4661432aaa62c208208e7fec760bd3f372
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a site offering a 'fun gamebox'. This suggests a lure to a malicious website. The presence of PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, often used for SEO manipulation or to distribute malware. ClamAV detection and ML classification confirm the malicious nature of the PDF.

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://trafffi.ru/strik?utm_term=fun+gamebox+3000+games+in+app PDF link annotation
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/6766029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f9cf0927fe73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8b41d16aabf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417221/normal_5fcbad4c12ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fb94317123f3.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/83edef0e-0311-46ea-9ac7-e799fac44d89/man_and_his_symbols_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e7e52a-0dae-4d00-b5f3-e8294e3361c9/30440946707.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/75041113572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a76ff9-6aec-44c4-a5a3-084482937c5d/45632862881.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/adobe_reader_app_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c70c086-9dde-4d46-9ede-2a3d38129882/dinezusofadaporasemusaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5292a6-9acd-4c5f-80b5-700255cc9b0d/balimund_merchant_chest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4423953b-0f81-4e29-bb4d-48f7440d208f/cisco_anyconnect_config_file_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a229685-d52b-4e61-92ed-b29a87c10c6d/buzax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8ae6c1-0593-4de4-b8d5-a9583e8650e6/brooks_brothers_sizes_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 5280 bytes
SHA-256: 5f3f977916b09ede5b8907d769b965172e6d6bf961801de2d2ff2380196b0ef2
font_01_sfnt_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 10892 bytes
SHA-256: 06df799179f8e421f1b37b8c03613b8dc62212a52d5d335a013473686074d728
font_02_sfnt_off000117ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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