Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ca68b789759e34…

MALICIOUS

PDF

75.5 KB Created: 2021-02-13 16:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 08255f94a0722581b0be5609678e42c3 SHA-1: bf378803690230acca8b6b7162452d1375799f44 SHA-256: e9ca68b789759e345666dce81e4637f6f91a91c7281017ba4e444f5aee6e60d7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains a large number of external links, indicating a link farm or phishing attempt. The PDF structure and embedded links suggest it is designed to redirect users to potentially malicious websites, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF's nature strongly implies a malicious intent to redirect.

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 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://bologen.ru/123?utm_term=first+order+kinetics+half+life PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5fcad177938eb.pdfIn PDF document text
    • http://medgaj.com/draw_in_boxing_matchm715m.pdfIn PDF document text
    • https://rozigakix.weebly.com/uploads/1/3/2/3/132303329/15651.pdfIn PDF document text
    • http://constructionhouse.info/assassination_classroom_ending_song51qqv.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/7XYZDgf/patanjali_yoga_sutras_telugu_free_download.pdfIn PDF document text
    • http://wordwild-store.com/790103741661xxko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_60062fe8e616f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_6003e9c0a3f2a.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/1704199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fee4a615cbdb.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/hfTgj22/lego_elves_rosalyn_s_dragon_name.pdfIn PDF document text
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/xokaxakul-vufiben.pdfIn PDF document text
    • https://sagiwotagemo.weebly.com/uploads/1/3/1/8/131871993/999f350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_5fd9039018078.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/2939851.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/bouncy_castle_for_sale_nzou5xr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FE 5128 bytes
SHA-256: 36507878aebbbc151c3af415dd79963363f806b48f4c7415b124f01a27dcb341
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 11488 bytes
SHA-256: 11e2b9513a87c6f1a7309b5fe42e359d522809ad923e352ee5aa062ff0fd6bb0

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