Malicious PDF — malware analysis report

Static analysis result for SHA-256 2450ec5c211f3f85…

MALICIOUS

PDF

99.7 KB Created: 2021-05-25 03:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 07a86e4162c5595026ab5d4a48de3a55 SHA-1: 1be5e0c6a1a5f38d12e1dd02df72edac72f2f4a0 SHA-256: 2450ec5c211f3f85553f1a6d33a59c4bbf2f72aa9ba5609b235a5a09b933cc52
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=ark+dino+spawns+ragnarok PDF link annotation
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/fevidikawesog.pdfIn PDF document text
    • https://kabenodetaxixum.weebly.com/uploads/1/3/4/7/134754863/puvivapakamepi-vebafododi.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/luwakulepitakedalise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5fcc9b5571c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_6062510a0b7b7.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/f6e9dca78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_6012cecc035a6.pdfIn PDF document text
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/c10ee9470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5ffc7e3d0fa4f.pdfIn PDF document text
    • https://sinegozedajosor.weebly.com/uploads/1/3/1/8/131871849/soximo.pdfIn PDF document text
    • https://kaxobemux.weebly.com/uploads/1/3/4/6/134676595/bibabegejaruna.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/kawotexulozax/35450658548.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/98852540048.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/36633236226.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/antivirus_app_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/4781362837.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/99618497824.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/10615912792.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/havoc_brothers_video_songs_tamil_hd.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 6320 bytes
SHA-256: eb2fd3d010639a4b372bfdc1fa0f639299f00ac481d25b3953f9a938161f03fa
font_01_sfnt_off00012bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB7 5240 bytes
SHA-256: 0ec1048cfd2e72d1c1d9de65cdd69536043e5de04deb5c44147e3254fded5e42
font_02_sfnt_off00013db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB1 14416 bytes
SHA-256: ab9d59f8b086c13caceccbc1ced3cd61136909609ed27aaae6f1c4dd227bf65e
font_03_sfnt_off00016b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B8B 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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