Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a42bd5a6eda49b…

MALICIOUS

PDF

64.9 KB Created: 2021-04-05 00:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 72869d85bd2d2dc5bc6b8844ca03855c SHA-1: 430d614168abdfdf114dbbfb5a20162ef5a4ba6c SHA-256: 27a42bd5a6eda49babb7cc31382681409972faecfcf44b84175d60c0dbc820a1
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spamming operation. The presence of a malicious ML classification and ClamAV detection indicates a phishing or trojan payload is likely hosted on one of these external sites. No scripts were extracted, but the PDF structure and link farm heuristics strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8435

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.
  • 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
  • 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://vilenefex.ru/strik?utm_term=hamilton+beach+iron+14212+reviews PDF link annotation
    • https://pusenosegunilo.weebly.com/uploads/1/3/4/7/134705238/xofulebezibezum.pdfIn PDF document text
    • http://baltika-trans.ru/augustan_agefvdtr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_6056d09c1e5e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503791/normal_5fe5976f640cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_605e1170ed391.pdfIn PDF document text
    • http://namekegosanobus.22web.org/shola_aur_shabnam_movie_hd.pdfIn PDF document text
    • http://itnegozio.info/873617007992n253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_600c99aa66e0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457272/normal_606a2941a2334.pdfIn PDF document text
    • http://tryse.xyz/afdd_eatonwrw30.pdfIn PDF document text
    • http://hookup673.site/ham_oven_roastpse9n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_600f41c31c633.pdfIn PDF document text
    • https://japejezapunat.weebly.com/uploads/1/3/3/9/133999519/316e601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_6016618e9a06e.pdfIn PDF document text
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/lorizagifulugiw.pdfIn PDF document text
    • https://fawukudaboguris.weebly.com/uploads/1/3/4/3/134353338/8346040.pdfIn PDF document text
    • https://kipokemob.weebly.com/uploads/1/3/0/7/130738996/firese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_a4a9ea1ddc294685b3a1fde34219a349.pdf?index=trueIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_ac11e5cd2c204f76b70af57a029344d5.pdf?index=trueIn PDF document text
    • https://6f29901e-f5c9-4775-879c-97b2de5c8d5b.filesusr.com/ugd/0bf195_76188644ee6e4a8ebc03da1ce2bcde33.pdf?index=trueIn PDF document text
    • http://nogobixa.epizy.com/suxataxekikelager.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_0a5fb2f6302949fdb1b0043e725e1f91.pdf?index=trueIn PDF document text
    • http://sebukojuteropib.rf.gd/10259980300.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_7a127d3c3bdd4dc894497fffe78c03f6.pdf?index=trueIn PDF document text
    • http://jitelujojutomu.rf.gd/reacciones_de_alcanos_y_alquenos.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 5564 bytes
SHA-256: d43bed6139cee53576ffec8bf745e68acb4f9fcfe8bbe9115e18374fb7bd1329

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