Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a812ff2c006d9b…

MALICIOUS

PDF

72.8 KB Created: 2021-03-25 14:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d970a7c68d623d9f7798f1e51e335dc0 SHA-1: 946b3873b39e5d8e644de6c46c4ee7579bec9190 SHA-256: 96a812ff2c006d9b7c00e9387dfdf7d237d61783bbc8b9bc788d162710ca05b0
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 0.9998

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=is+sammy+alive+worksheet+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6009f0920c0eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_60343658e1d4e.pdfIn PDF document text
    • http://misiliv.66ghz.com/aura_kingdom_client.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_f5e0c43dbbf14e38a98b67caf05561b8.pdf?index=trueIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_fe43b57993a44764876c761c4d3e68fa.pdf?index=trueIn PDF document text
    • http://vowoxemaxevajo.epizy.com/sirumimevezudefidutaxupev.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_6c4e069aa33a47c89c5fcaf46c23ac57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/564eb990-9304-48e7-89a6-d126e8b39f18/59629443496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4d3692-f016-4e4f-913a-3aa86c6bf4fb/jexebademowuwabifekovati.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/evil_dead_movies_in_telugu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/8146139977.pdfIn PDF document text
    • http://nomikidavex.rf.gd/nidoduwabibexawi.pdfIn PDF document text
    • http://xolelapideruse.epizy.com/62167656236.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/63977099294.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/furopogola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bc5617-9132-47cd-a355-8c2f67af2a84/winchester_gun_safe_combination_instructions.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_9c35dc6f85734f0a811a17bcb8c2ee26.pdf?index=trueIn PDF document text
    • http://tanazutoja.rf.gd/jujomuwij.pdfIn PDF document text
    • http://botetuvixomidiz.epizy.com/marulukutonule.pdfIn PDF document text
    • http://rigeladujonij.epizy.com/6203716100.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_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 5180 bytes
SHA-256: ef9d1ca611f3e0937f1aca7d99783807dc08f06c66a2f50c923c5a7a03470517
font_01_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 9864 bytes
SHA-256: 1ddbd13bcf56879b541b475a8b44694ab1ffdb0602805104deb2fd607176529d

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