Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f875cf7a4f9755…

MALICIOUS

PDF

77.0 KB Created: 2021-03-04 14:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78b884d1cea325c0dd3cb362dc38e916 SHA-1: c94ef2dd9a72ef9a8de56f124b7c518926fe7e23 SHA-256: f8f875cf7a4f97558b5692683304dfd6627c142b7a5a1c82fe7b633cae160a3b
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-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://soxebez.ru/123?utm_term=technical+analysis+of+stock+trends+pdf+github PDF link annotation
    • http://fofiwafajelerax.sportsontheweb.net/98048085952.pdfIn PDF document text
    • http://edapog.online/surf_report_higgins_beachmem1p.pdfIn PDF document text
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/vatok.pdfIn PDF document text
    • http://teasmall.space/plural_form_of_aufgabe_in_germanzmxts.pdfIn PDF document text
    • http://naturebiolog.fun/279221946590qulb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6023d2ee0ed61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_602b83a779b69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fc96cee52942.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/how_to_make_a_3d_candy_cane_out_of_paper.pdfIn PDF document text
    • http://ekzo-fruit.ru/63964137955uo8lo.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/cisco_meraki_mx60w_manualz3pgw.pdfIn PDF document text
    • https://zawibovime.weebly.com/uploads/1/3/2/6/132681883/tizomoluzunajonot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_6040211d05b75.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/gisevatex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475000/normal_5fda5e4dd8fb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soxidavalib.rf.gd/39182811813.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/crash_bandicoot_ps1_rom_espaol_android.pdfIn PDF document text
    • http://porumujowupof.epizy.com/88490198081.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/9851904200.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/mobile_application_software_free.pdfIn PDF document text
    • http://sajetubaj.epizy.com/queen_size_platform_bed_frame_with_storage.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/fe_reference_handbook_10.0.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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5672 bytes
SHA-256: dad59f7455e096cee5d7283a035caa986f55fa6dcf1a8977ea1c69743770d871
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 12968 bytes
SHA-256: 7f58030ed7c128455a20859b2391cfe57d981b2a1d98dc6d9ab51040114bcfec

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