Malicious PDF — malware analysis report

Static analysis result for SHA-256 3989508e203f6594…

MALICIOUS

PDF

76.7 KB Created: 2021-05-25 05:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00766b0a0d2bc804de9b6ecc77ea6ee3 SHA-1: aee8ceb16bcd74d87e42ece9cb64b573e77f741c SHA-256: 3989508e203f65949ffa0cff8e61e6330b84d2aa9e38f1a2edecd972e4f70a7b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or a distribution point for further malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cdn-cms.f-static.net/uploads/4367947/normal_5fe90fb117669.pdf In PDF document text
    • https://subamepowesita.weebly.com/uploads/1/3/4/8/134875458/5083622.pdfIn PDF document text
    • https://getesedalo.weebly.com/uploads/1/3/4/6/134629657/3e2625d00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_604e4687e1ddf.pdfIn PDF document text
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/f12dae8aa41.pdfIn PDF document text
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/797d08fc6.pdfIn PDF document text
    • https://kedasolusezobu.weebly.com/uploads/1/3/5/3/135394891/4144612.pdfIn PDF document text
    • https://vidowenabep.weebly.com/uploads/1/3/5/3/135322196/5429480.pdfIn PDF document text
    • https://bokusisosi.weebly.com/uploads/1/3/0/7/130775109/1cf03c20d0f276c.pdfIn PDF document text
    • https://nadepopuzoli.weebly.com/uploads/1/3/4/6/134611029/922920.pdfIn PDF document text
    • https://solubowobadiwu.weebly.com/uploads/1/3/4/6/134642134/joxaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=head%20first%20python%202nd%20edition%20amazonPDF link annotation
    • https://uploads.strikinglycdn.com/files/6587f556-efe6-4bc2-b139-51abc4bc7275/dopepamutemadir.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/67476552530.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/72565537110.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/nasedewigewudoragazimi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/bookerly_font_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab784fb-8219-439b-b586-0cb2d89f7207/79658547482.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/law_officer_s_pocket_manual_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0815eb-8c5d-451e-97d4-6552557c375d/apex_tv_stand.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_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5492 bytes
SHA-256: 5711605068513dacec083b0d7a2d9048d4f8a7226995b972b8dad261d21a4fe6
font_01_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 10852 bytes
SHA-256: e2d0c855afd7f0e9b8217e87163cf6cdc593969314b0cc3d04ff9d4e31c7123f

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