Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a66bbd6fdb782a7…

MALICIOUS

PDF

66.3 KB Created: 2020-11-09 18:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 07deb044234209fa71ca12e446ca220e SHA-1: 775bde0cdee69fc2616b989880bb95558645d54d SHA-256: 1a66bbd6fdb782a7bd8e771c4811728e5ad63ebf6b0e078ab479852737cdf0d6
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external links suggests an attempt to direct the user to a malicious site, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://gettraff.ru/aws?keyword=lunar+iptv+pro+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5fa320f9df08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f895ea464076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_5f91c4b255a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450625/normal_5fa0ae2ddfb31.pdfIn PDF document text
    • https://kedupopadas.weebly.com/uploads/1/3/4/5/134588367/3073390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f877819a65fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_5f9a46bbb123d.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/penefelomiju/pengobatan_aterosklerosis.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/wenumuvebojuvixuzedene.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/bmw_brand_identity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f032f49-05c2-4fc1-b888-381e6e71a675/99073441152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1182dd47-291a-4a3f-b599-5df27c4be5cb/nufubufakagawi.pdfIn PDF document text
    • https://account.lunarpages.com/In 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_off0000beff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFF 4668 bytes
SHA-256: 259ec1a52ae73edc8ea4c874992036100c1ec8f3e055fb40aad5bdf035c27087
font_01_sfnt_off0000cefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFC 14632 bytes
SHA-256: 1512083dca41108a63fddf5cd13a5dc2f0533cfd07da12d373ad41bab24fc4b5

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