Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91b3720d90105a6…

MALICIOUS

PDF

104.9 KB Created: 2020-11-11 09:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 763e264f5bc9a63a29d1ff9c866e8015 SHA-1: fa47c23f624d822927f3f9455b55e3f44fe783d6 SHA-256: d91b3720d90105a6c838a72e51cce293c199e8c91a1607ef1a7efbdef2c7c066
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the external URIs, 'https://trafftec.ru/123?keyword=1.+mills+v.+dc+board+of+education+1972', is directly referenced. The presence of many external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?keyword=1.+mills+v.+dc+board+of+education+1972 PDF link annotation
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/wibudolalamatix_fuxetokama_mopivulit.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/tuzumisuda.pdfIn PDF document text
    • https://simipupipez.weebly.com/uploads/1/3/4/7/134716676/6404900.pdfIn PDF document text
    • https://moxipilewuzeget.weebly.com/uploads/1/3/4/3/134360433/gitefavilesoku-wapexa-nuvezomep-kitibunajomib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/34359476421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a5c06a-f08a-4662-b5e4-c6f24ca70994/rurulonowuzobojel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abffc19a-018a-45eb-af46-5563c481da81/barrons_sat_math_2_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff90c541-883c-4733-ad7d-2952e126f37d/cyber_bullying_essay_tagalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671af963-604a-451b-9251-c8454d1d5329/14996390671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be79079d-6125-4bf8-b581-58de5e4545b9/dumewevokajovipuviwosiso.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/zonation_definition_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/crash_course_python_programming.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_off00015f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F38 5724 bytes
SHA-256: b4e30e141cd675d65026109c2f5f3427c1ddec279c3f7a22e23ecf344e9595b7
font_01_sfnt_off000172ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172AE 10412 bytes
SHA-256: e8ca30623ab1ef2cb4d4af21f7cbf4ae3a9eb6e1c5a8c9cc6eee3ed2cfb16b29

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