Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de6727c8ef4f60f…

MALICIOUS

PDF

69.7 KB Created: 2020-12-27 15:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc177baa7a8c2806fee7b35fe1a4e051 SHA-1: 1c14844c3e7cfec33b35395a50cd155355fcf1b2 SHA-256: 8de6727c8ef4f60f2c073ee5a5eaf8bcb116a543f1efcfbf4dca7c1b7152462b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=show+me+free+hidden+object+games PDF link annotation
    • https://cdn.sqhk.co/bodovukig/Nif5RRl/88658294205.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/d8065cd0ebc23d.pdfIn PDF document text
    • https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/6201548.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/lamer.pdfIn PDF document text
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/lezuxepifux.pdfIn PDF document text
    • https://kitarenabokuvum.weebly.com/uploads/1/3/4/4/134479912/715b50.pdfIn PDF document text
    • https://bizigixuwufi.weebly.com/uploads/1/3/4/6/134692051/248ed59c7b91.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/fajetufekejo/avery_shipping_labels_template_10_per_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/59828504533.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/docket_sheets_va.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/wirugijamix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c831fdf5-377b-4db6-a822-033a71164ccf/koxada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113e4d7c-1b0f-4f63-8a2b-5abddb41481f/wikeleji.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/chemistry_sample_paper_2019.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_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 5816 bytes
SHA-256: eeaa50af87cd50402d105a350008d3af3e4abc840a2713e005f7eebda5b2a1bd
font_01_sfnt_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 10512 bytes
SHA-256: 94fc3854baf34266849ee55acb881ce396635813052f930e625233e520149146

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