Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6210246a44bd7f6…

MALICIOUS

PDF

80.1 KB Created: 2021-03-05 01:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 000984b713a4b7c34654918d68470fd5 SHA-1: 9d4e2ed0b1cd3cfc3cf6682f5495e6fbbbf9187d SHA-256: f6210246a44bd7f629875d7e23252d9fedb0824041f02fd6fbdc2dcd8916fe8a
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 0.9991

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://mezovuduw.ru/strik?utm_term=casio+g+shock+ga+110+1ber+manual PDF link annotation
    • http://susojatafumo.22web.org/dsc_pc1616_low_battery.pdfIn PDF document text
    • http://jopuvalipi.22web.org/gafujabetokil.pdfIn PDF document text
    • http://vuzatiriranune.22web.org/tamil_album_cut_songs_isaimini._com.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/teximikamukubo/45000584478.pdfIn PDF document text
    • http://litopuputorer.rf.gd/free_tenancy_agreement_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/rovazaloletizolekozepejan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c2809d-be27-4aef-ae02-059c47e4039c/texas_month_to_month_rental_agreement_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7eb8f0-ea77-43af-b275-42133a0fc29c/zumarewivavawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1236a2fb-5088-4791-81ad-0ce09a72a2b3/5650058129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4ae019-fe6e-462a-bba7-2558c9ad4b66/wojesi.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_4a4e139e69bb49bcb40fedb86f3bc781.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/52002771537.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/castellanza_formaggi_spa.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/race_car_free_printable_coloring_sheets.pdfIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_2880d48de9754fa59b284295747e3237.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zizene/idsa_guidelines_hap_vap.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/zovidigojemojulafabudamu.pdfIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_f3dd75633e3f42268b966996d614dd62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/what_are_the_different_traditional_music_of_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/napupit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e310e1fc-9be5-4dd4-b082-6870fe877c87/25548466547.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/folixidalifegogimumugoli.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/wikizoxuganebupudeza.pdfIn PDF document text
    • http://kiburomuwilun.epizy.com/rarexudegedixevimam.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 5516 bytes
SHA-256: e6e8a9687900c4732f74693200d34c45eeca730503ed6657241d8867ceede871
font_01_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 10388 bytes
SHA-256: 6152f05bbf695d24bbad05b1a691f20f2675c0f1d0f34036149af3c82cff022c

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