Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a0bab9e55c4dcc…

MALICIOUS

PDF

70.0 KB Created: 2021-03-28 11:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8487074fddb2b28a7b4c101f6450b56e SHA-1: c0652a986675d9a564fba5370332247c9a09d087 SHA-256: a9a0bab9e55c4dcc8e3e25bf62751598c0000c1b8c02b5ca0cd3a918d6476895
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://zajinet.ru/strik?utm_term=el+himno+nacional+de+honduras+en+flauta PDF link annotation
    • https://sosojisizavawov.weebly.com/uploads/1/3/1/4/131454692/zesibiwutom.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/xamoxatepu.pdfIn PDF document text
    • http://lazokiwumemo.mygamesonline.org/automated_guided_vehicle_project.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/gusonosawa.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/muvafapetav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_601e79059b4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_6014b434b68cc.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/good_description_of_starship.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369138/normal_5fce34b9d8560.pdfIn PDF document text
    • https://jewepixixa.weebly.com/uploads/1/3/0/8/130814248/fulivixo-mejixupexikit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobebol.onlinewebshop.net/serial_para_abbyy_transformer_2._0.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_ba8864982b02469d981c5adb93caa0d4.pdf?index=trueIn PDF document text
    • http://rukudukewa.epizy.com/catherine_the_great_book.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_6324bae6cd194c2cbfa986ad8d87b260.pdf?index=trueIn PDF document text
    • http://dowafirowelumex.atwebpages.com/zurizaluzesikaritapomonil.pdfIn PDF document text
    • http://kurujabarufuxe.rf.gd/sobode.pdfIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_092ec021bbd940559d721db966ea3b44.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_85c55596462d4324b7bcdaba5c9795e3.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_07307029bd674c989c0a51e2a0c6cfcc.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2D 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 5216 bytes
SHA-256: cec4293189111063513e5b55374ed7c4646ceed2adcfdc21201c8c8aff78a890
font_02_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 9284 bytes
SHA-256: baf59f451ba20d16384171f7231e3c9321816ed70948f4e21a74cc487e710b51

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