Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86a596c83149f6f…

MALICIOUS

PDF

68.3 KB Created: 2020-11-20 12:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ffa2cd0e6574fd57263b687023fa2e69 SHA-1: 20fb317f2c35cf2b54d10ed9093553dc49f9198b SHA-256: e86a596c83149f6f24ca90fac91f6bf36c89de74f1e93136118096511ba3b336
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 0.9998

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://trafftec.ru/strik?utm_term=words+their+way+letter+name+alphabetic+sorts+pdf PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/zunepowaxujevud.pdfIn PDF document text
    • https://dotifusogibosu.weebly.com/uploads/1/3/4/4/134458831/cc07a8d2a6257.pdfIn PDF document text
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/1967718.pdfIn PDF document text
    • https://vobemebu.weebly.com/uploads/1/3/4/3/134383317/safino_kekabafijuv_dutusuxipoku_pewegepowam.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/9807867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f8c0458717e0.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/dixaleko/53089204739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a7ac41-431b-476d-b6d1-fcad00e82224/lemaxurukulikevebi.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/25533450270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d1d4f5-e8e2-4621-82df-2acedf7403cf/teriporidebutadusavufusi.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/nagatobik.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/growing_snow_peas.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/deuter_guide_lite.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_off0000ccb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB3 5740 bytes
SHA-256: f6bf0fbb0e00dd1e040e4ab51f913c30b74a8a292ace7a90a76256b3cf4729c9
font_01_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 10424 bytes
SHA-256: a679a37b9b2455a27e370e273f82fd13b066f41c35fae4da72e255666fae0070

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