Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5555ec3848ac42…

MALICIOUS

PDF

71.6 KB Created: 2020-11-11 09:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 44c14c2edd34fc0bc4a058684a5ede07 SHA-1: b380e9d0e840b991b04df23545392ed64a5acc3d SHA-256: 5d5555ec3848ac426618aac46d0d15cfb56c8c787d07a036e6ec8f7175e58cfe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a website with a keyword related to 'Halo 3 armor unlock'. This suggests a lure to entice users to click the link, potentially for phishing or to download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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://traffine.ru/123?keyword=halo+3+armor+unlock PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f8d92ff6e3d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f9172524ba5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5faafdfaa84ed.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/dotosemuzugabav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5f98399748a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f87ba82c60b2.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/taturi/digital_marketing_interview_questions_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/inverse_z_transform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51846e56-0ed4-4e49-b06d-4b95421dc64c/92453662087.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/63143967903.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/560869942.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/4584576889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d85892-840e-44cb-8759-ba424e2615fb/gitakosada.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/how_to_get_proof_of_address_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686d78c1-59a2-4033-8a27-b7a820690b39/watch_moana_full_movie_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3128e363-34c6-49f4-ab34-87c73ae172c1/pipaguwojarugubut.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_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 4956 bytes
SHA-256: 7ecf767b3bdda74625d47dcb6daf75ab6844d7b095e4458a88adf5275041c36e
font_01_sfnt_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 10696 bytes
SHA-256: 6d05b435a1a0767e583e470368381b65d3b35b325878f49c664030e0035a331a

Open this report in the interactive analyzer, or submit your own file for analysis.