Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b83aa198c7f47c8…

MALICIOUS

PDF

95.7 KB Created: 2021-02-24 01:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ea9aa9c9aeb8e13f73e17c564eaa5e98 SHA-1: 73aae85a770b16f7b81190d411aea17bf977b722 SHA-256: 5b83aa198c7f47c87c60148f0f595be06567c40ddd69a92236a2b889c0a7107a
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 0.9982

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://jacksth.ru/strik?utm_term=who+is+the+strongest+one+piece+admiral PDF link annotation
    • http://wawepeb.22web.org/pabalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_60143d1f727ef.pdfIn PDF document text
    • http://nuzabokazovuwa.iblogger.org/maritime_safety_management_system.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5fdd8b73b11e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419827/normal_5ff553d0d2c60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500677/normal_5fdeda87c9fa8.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/lejajasizuwojaz.pdfIn PDF document text
    • http://infonewstravel.com/sakolafolexexojesetawe21v.pdfIn PDF document text
    • http://instapriz.site/what_chilean_island_inspired_the_story_of_robinson_crusoegof6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5fefe6bfdc2a4.pdfIn PDF document text
    • http://lasleymarkt.ru/238053297957sfv5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492272/normal_5ff0bc96544bc.pdfIn PDF document text
    • https://nojefawagalubab.weebly.com/uploads/1/3/4/2/134266261/zokobu.pdfIn PDF document text
    • http://avit0.cc/ikea_desk_legs_amazon4r4u0.pdfIn PDF document text
    • https://venonaneguwar.weebly.com/uploads/1/3/5/3/135398509/jefanomam_darerixefoj.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/rexutojilajone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_601d301e2e8f1.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/xalasawu/88371925055.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/pagujopilunurojuwij.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/new_play_store_app_apk.pdfIn PDF document text
    • http://teworubinogo.epizy.com/54268855765.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/writing_a_letter_of_application_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/disezevotufasetuxelasom.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 9832 bytes
SHA-256: 8f9ec47f0996fcda8b412b8946d3d84bed7dc7f1326e0d620fa0e02b64b30c9b
font_01_sfnt_off00012408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 5500 bytes
SHA-256: 467c5c56589f87c7ab677f92164097897206082f1e9c97302e38f6fefb9b8330
font_02_sfnt_off000136a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A3 10980 bytes
SHA-256: 591b2d465474f06d5d6483a183f1a314277b1a5fc3ddac1511b489b2d5e5d889
font_03_sfnt_off00015b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B89 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa

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