Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b5c34b52b7b99d…

MALICIOUS

PDF

73.6 KB Created: 2021-03-21 11:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 69830c34a9dc3b0f23e0717ed6478483 SHA-1: 570774df1cf511fcfb21621b4aeb389352af735d SHA-256: 92b5c34b52b7b99dfda41a3b446cc604b321938cdc4a3960f06567b53a8f4afd
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 0.9999

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 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://dugedepap.ru/wix?keyword=cloudy+with+achance+of+meatballs+pdf PDF link annotation
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/subomu.pdfIn PDF document text
    • https://gojaxuwawozupu.weebly.com/uploads/1/3/1/0/131070912/wenabepiratosut_bewalufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_603a442ba0966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471945/normal_5fff07e138710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5ff9d4cad1b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_600f404b37bc0.pdfIn PDF document text
    • http://xulazawelinuze.scienceontheweb.net/mulawunonekes.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/31777486702.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/4117957.pdfIn PDF document text
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/948f680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcbc66f2c480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500453/normal_6020d1ecb858f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/446ee5e7-7cee-4a13-9c0d-91cd2014bd67/longman_dictionary_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4a3384-0aad-4e3b-9e39-e2a100364f68/zonal_cavity_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ecff776-44ee-41b0-a150-0329e429db3e/where_are_aircare_humidifiers_made.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9220d59d-6017-4fdc-b3e8-ae49d976744c/zoom_g5n_manuale_italiano.pdfIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_aaff5edf2fd54486a505efdb0e69495f.pdf?index=trueIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_dad3e11bfbed4a69abfca637acabfb01.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19D 5536 bytes
SHA-256: b2d1441d3ac713a110dd324a7a2572b585f66c162cf89c148e2372b5094628a1
font_01_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 11092 bytes
SHA-256: d29a5c1a87a8df20e68efc3f84a049ddb274b37fb6b7961192c97763e324304d

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