Malicious PDF — malware analysis report

Static analysis result for SHA-256 126563e001c4eeba…

MALICIOUS

PDF

42.5 KB Created: 2020-10-31 18:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0d1c92ed6faf02fe92568f7293f65462 SHA-1: 20540c06c6276d75eb74d863c942997f4eea895a SHA-256: 126563e001c4eebada7006331b88751a970c281adeedd6516b4940d414990571
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded links likely serve to direct users to malicious sites, potentially for phishing or to host further malware. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a link farm or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://cctraff.ru/strik?keyword=i+wish+there+was+a+way+to+know+you%2527re+in+the+good+old+days+the+office In PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/fcf69ca7ff.pdfIn PDF document text
    • https://zejaxosadakawur.weebly.com/uploads/1/3/4/3/134372542/mipiwegul.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/6004079.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/vidadamugesosa.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/wowiput_xixojubajofu_tediseru_bebolivafaku.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/ac75d4e.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/3882295.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/4700299.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/bipudomu-zovexolapagiso-bosadaseki-pibib.pdfIn PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/5544638.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.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/mijedusovineti/97350832051.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/statistical_physics_problems_and_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11143e5e-36b4-41e5-b04e-e33bbeec4ed0/poemas_famosos_de_pio_baroja.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_off00006648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 5512 bytes
SHA-256: 04a7bc9a532ae5e7fa48cd536f5cb818029fddcfb376e424942644363a02a779
font_01_sfnt_off00007927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 10396 bytes
SHA-256: eba009e1aceb4b37eeb7cdae0bd85fe35c45caf4fa762b3128b8d54ef8f9c8fc

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