Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8fa6ae07afc4db…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 03:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5d9e7d591c9f7e6e2e26d288ff5d0f42 SHA-1: 82f04ed4c55f7e2b29f490dfbc3805edaea601ab SHA-256: fe8fa6ae07afc4dba4b991ada23531b79a5cba1f0170dcf0358ac094e9854184
186 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 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=can+you+bake+a+picnic+ham PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5fe0dc994dc9e.pdfIn PDF document text
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/buxililefudixubexini.pdfIn PDF document text
    • https://wadaletabuj.weebly.com/uploads/1/3/2/6/132695896/mibasojogo.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/4422897.pdfIn PDF document text
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/nezikikoxuvuwepo.pdfIn PDF document text
    • http://berozava.iblogger.org/63817715231.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/7d5f9936c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_6046655f227f1.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/fipijife/what_is_man_shed.pdfIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_d3629735a6bf464b9ede25c451a1c74c.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_220e468209a5488dbe0123de232df7c1.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_25aec97eb7734339bcc2fc1195a6059d.pdf?index=trueIn PDF document text
    • http://lafodinozaz.rf.gd/amsco_apush_answer_key.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_a0681a85dfe54a0fba0f758a3c73aaf5.pdf?index=trueIn PDF document text
    • http://vobewegogiz.rf.gd/code_talker_book_report.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_c5c9427eaf6c4299bbd28e4f0da37756.pdf?index=trueIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_c9061e1955eb478da9221efb2a260a89.pdf?index=trueIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_c64a98159ff04c73ae56088be6db5078.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_21d2ade130fe4a1eb052614968d897c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/62867279719.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_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 5076 bytes
SHA-256: 6618e8125fda3073c942949a73bc46b5eb5bacc9a8bacdd92f34cd07fa57b4a6
font_01_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 11268 bytes
SHA-256: dd5c22588295ad86f2ad3df7bdf67e1baa46c7e23d6bcb2f73b9e5b72de54728

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