Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a319e1e32e02328…

MALICIOUS

PDF

82.9 KB Created: 2021-01-17 15:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ef6a967bf3388cec0c4fadb6968e2710 SHA-1: 22bb4f1db60886f99d9bafc817ae8340601a8079 SHA-256: 9a319e1e32e02328ea1966a2bcd22838359ad9d5615ba0699480bb143fc517b5
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate that the primary goal is to redirect users to potentially harmful websites.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/aws?utm_term=o+level+date+sheet+2019+zone+4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476142/normal_5ff60f178892f.pdfIn PDF document text
    • https://site-1167951.mozfiles.com/files/1167951/omegle_app_store.pdfIn PDF document text
    • https://site-1171407.mozfiles.com/files/1171407/sum_of_finite_geometric_sequence_worksheet.pdfIn PDF document text
    • https://site-1200144.mozfiles.com/files/1200144/postgres_analyse_performance.pdfIn PDF document text
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/17defecafac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5f93cf356c9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_5f9a95a249850.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/sugisi.pdfIn PDF document text
    • https://site-1245455.mozfiles.com/files/1245455/vadiwimifefuz.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/free_math_multiplication_coloring_worksheets.pdfIn PDF document text
    • https://site-1177068.mozfiles.com/files/1177068/91727744901.pdfIn PDF document text
    • https://site-1178814.mozfiles.com/files/1178814/fazujigu.pdfIn PDF document text
    • https://bezaranave.weebly.com/uploads/1/3/4/1/134108953/nagofas_gesijeleka_lazonemusopit.pdfIn PDF document text
    • https://site-1178235.mozfiles.com/files/1178235/61642205362.pdfIn PDF document text
    • https://site-1178468.mozfiles.com/files/1178468/13070507812.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/wazorixekunafob/47907022920.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/37605966746.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/27543086545.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/14140814141.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_off0000f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F3 5264 bytes
SHA-256: c10aff8efae7c1902fbe09289da770541566545267051ca433424a4e2b1ae64d
font_01_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 11196 bytes
SHA-256: 71524995a3f858296bc6ac067716f4ad95281a5c1f7d29aa9e13ba4213ef5f2a
font_02_sfnt_off00013012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13012 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.