Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95e57418a5957fa…

MALICIOUS

PDF

43.9 KB Created: 2020-05-18 01:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 0f6f849f415c0df2637b8630b58656c0 SHA-1: c9b885ceb12d89867d9b25152a440bac887b1e37 SHA-256: c95e57418a5957fac3daf22bbd79a11a0cdb8e2c229d61d1045bb5e99f0149b9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm of external URLs, many of which point to other PDF files hosted on similar domains. This suggests a tactic to distribute malicious content or redirect users to phishing sites. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://ctrventures.net/uploads/1/3/0/5/130590608/130590608.html#hebrew+bible+online+pdf PDF link annotation
    • http://wincliffproperties.com/uploads/1/3/1/4/131483197/068c0ccd023a.pdfIn PDF document text
    • http://nativenationarts.com/uploads/1/3/0/7/130740419/pidebipujozetuxir.pdfIn PDF document text
    • http://jamiebrownmiller.com/uploads/1/3/0/4/130476403/9684758.pdfIn PDF document text
    • http://nishkamdivineservice.org/uploads/1/3/1/4/131438741/9372562.pdfIn PDF document text
    • http://gosafealarm.com/uploads/1/3/1/1/131164294/gejutive-vuvutosilado-bobosuduxulirem-xokadupifis.pdfIn PDF document text
    • http://baycentrehealthandwellness.com/uploads/1/3/1/8/131856212/354712f64.pdfIn PDF document text
    • http://luxxe-white-by-ac-88.com/uploads/1/3/0/7/130775115/jobogapal.pdfIn PDF document text
    • http://buyblack360.com/uploads/1/3/0/3/130323113/5979b806e95bb.pdfIn PDF document text
    • http://blackhollywoodatlanta.com/uploads/1/3/0/8/130874320/5686134.pdfIn PDF document text
    • http://boettcheroutdoorsandbushcraft.com/uploads/1/3/0/5/130539319/ruxetiwajujaxurupax.pdfIn PDF document text
    • http://healingcrystalwirewrapping.com/uploads/1/3/0/9/130969999/7330455.pdfIn PDF document text
    • http://dec-or.ch/uploads/1/3/0/6/130621443/9627026.pdfIn PDF document text
    • http://ecokick.org/uploads/1/3/0/8/130814200/gapuluvupu.pdfIn PDF document text
    • http://southernapartmentgroup.com/uploads/1/3/1/3/131383981/zodurigeweseru.pdfIn PDF document text
    • http://dimpsgroundworks.com/uploads/1/3/0/4/130476586/kofujunixunasefunut.pdfIn PDF document text
    • http://kirkdaleconsulting.com/uploads/1/3/1/6/131607152/teviralajug_rusudo_mavem.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F4 10376 bytes
SHA-256: ff60942e1ea6eebe1d2b550db9cabd2770719bcb30d39dfd70cb026c06567aa0

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