Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84d8a22380b2c8d…

MALICIOUS

PDF

72.8 KB Created: 2021-03-28 08:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c0087642cdc0780edae5cf1dfb082ae5 SHA-1: 5630e5ccfc3e1288c0e8c96a9f872eebbafcff32 SHA-256: c84d8a22380b2c8d4ec4d3f7b78440ffff2c57425ead1106097d6a59fedd6054
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 0.9997

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://soxebez.ru/award?keyword=fitness+workout+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383160/normal_5fce459e0f210.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/81489686910.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/who_first_used_guerrilla_warfare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_5fd1fd462424b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5fdb34bc416ee.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/ozone_500_mountain_bike_24_inch.pdfIn PDF document text
    • https://vuwawirekexaz.weebly.com/uploads/1/3/0/9/130969699/e29ffb1613767d4.pdfIn PDF document text
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/170089b847a09ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_6038c6d5eaa47.pdfIn PDF document text
    • https://marabobufazezi.weebly.com/uploads/1/3/5/9/135992859/bilat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/85f4d9ba-28d0-4d5e-9b87-31efc5f0aa6a/everstart_maxx_78n_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/china_military_power_report_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da08081-8d26-4ffe-846e-2b1cdb1444cd/41839335139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe7bd84-830f-4a66-9a45-01e48d7eb8dc/56488592856.pdfIn PDF document text
    • http://reladefuxuna.onlinewebshop.net/hunger_games_ebook_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/66729000915.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/project_outline_template_google_docs.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/craftsman_42cc_chainsaw_carburetor_adjustment_tool.pdfIn PDF document text
    • http://viniwowosur.onlinewebshop.net/ruwemisegak.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/xefokamepix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B1 4960 bytes
SHA-256: 19941903e740f98cb0733aa6545c35db05b5a4bbc8ed3aefbdb9e4c90ceb3490
font_01_sfnt_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 9960 bytes
SHA-256: dd19457fae6c66411d70cec44ed9e0a8adfb2bfdb40710203677cb7c84026f53
font_02_sfnt_off0001087f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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