Malicious PDF — malware analysis report

Static analysis result for SHA-256 92963dce853d2bf2…

MALICIOUS

PDF

81.6 KB Created: 2021-04-12 06:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f30aa76239019578e3e6925e36a3124 SHA-1: cb382a6efc2c455371e4d880a55c7870557f8a7a SHA-256: 92963dce853d2bf22a4a06bca3a54721025ae018ca1552ecd8116d59cfc5907f
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 0.9996

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://seumenha.ru/strik?utm_term=what+food+goes+well+with+a+rioja PDF link annotation
    • http://stavki.link/senurovutajixesotogefufiwaburw.pdfIn PDF document text
    • http://servicesforsupport.com/nucleo-f103rb_user_manualnboro.pdfIn PDF document text
    • http://itprod.space/the_minister_s_black_veiljtmw2.pdfIn PDF document text
    • http://sdek-24.cc/jlab_flex_sport_wireless_bluetooth_headphones_reviewx1qva.pdfIn PDF document text
    • http://astropsychology.website/kiwetivavywroo.pdfIn PDF document text
    • http://yesstore.pro/12463013327nov5y.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/vonuxagupeduze/98583817459.pdfIn PDF document text
    • https://5e04165b-6ab1-49a6-9937-45006fc2fbeb.filesusr.com/ugd/d19879_f5ab94c4c3bb4f2e9bdf99f02e373864.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuponefi/1909789973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15077c8c-b4bc-4c56-9bc7-22ce7290f49b/hp_laserjet_pro_400_m401dn_cartridge_number.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_336391f766bf4aceac69964c128caaca.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_415f096a4adc4ce3ae298c40c031042c.pdf?index=trueIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_4b167bcebe4d467289890a8f7b9e9187.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/project_management_methodologies_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd22fd2c-b3a3-4b3f-a013-3fe198535e17/will_low_batteries_affect_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/60468520218.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/sixepej.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_23412b75ceae4ef3bb2dbafdfd9ae3ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/751e27ca-88b8-4e46-a6ff-2f02500109b7/jig_2_redux_sheet_music.pdfIn PDF document text
    • https://b24036c1-08f6-4d5b-b8c9-f4c47f26e437.filesusr.com/ugd/ae9acc_a4d7a43f2b5248feabd1d2c6fe28a5a9.pdf?index=trueIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_d43e4463908c485ba44006f5b9ec2f77.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_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 5352 bytes
SHA-256: 619dcac2cb4c0f38e0af09d8e8d53c5293151bab09eceec83e85fa98bf4fc92a
font_01_sfnt_off00011019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11019 11704 bytes
SHA-256: a55eb1d5fc9119cb7c1fa91e4d5dfac5fc4fb1f4692cfd6ac7e9aa87049533f4

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