Malicious PDF — malware analysis report

Static analysis result for SHA-256 329b1b4e4214c960…

MALICIOUS

PDF

69.3 KB Created: 2020-11-14 10:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 777e5fd56769a8b7da14f8de1d590aa4 SHA-1: 157c1fd19aba39fc3e925de62580cb2fe3f4c3af SHA-256: 329b1b4e4214c960f3b2fa720659e02fe6a65ee6eed6688e61f7db9fd35aacac
214 Risk Score

Malware Insights

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

The PDF contains a large number of links to external resources, masquerading as educational content, with one primary link leading to a known malicious redirector. This suggests a phishing or scam attempt designed to drive traffic to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/aws?utm_term=gcf+and+lcm+word+problems+worksheets+pdf In PDF document text
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/8afa4e517895.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://s3.amazonaws.com/najubu/81164094390.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/p5_twins_confidant_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8288e78-3218-417b-a7ec-7145ccec6206/45216962355.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/what_was_the_trail_of_tears_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da037ae-f1ad-43be-9f7f-34918c200460/tabla_de_integrales_y_derivadas_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/ffxiv_3102_error.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/32879733194.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/romorawopup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ac3c51-72b7-40a8-987e-2399cd230318/2066715451.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/craigslist_roseburg_org.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/geometry_unit_8_test_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5658fea8-6452-4731-8032-ef7cb6f0c97a/rumebili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53673964-40f1-4fe6-b145-2cd91e09b99e/38087892322.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/english_plantain_w9.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_off0000c395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC395 5464 bytes
SHA-256: d2f51e22dde81316b78f70077ed0fdf87e5d4ebff3989838a9cd9f4240b41981
font_01_sfnt_off0000d60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 10536 bytes
SHA-256: da2597ad79289fb3b015706c67949529ed5f539b8801c1744cae01370310b5f6
font_02_sfnt_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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