Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f464d58aae1cb0…

MALICIOUS

PDF

78.7 KB Created: 2021-03-30 13:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae13dd92f008499fbfc9f1fac0f0964a SHA-1: b0024c11abde8803039bfb3d102be14579e5b48e SHA-256: 52f464d58aae1cb083c21afe5234e4b8be02bd406d6db5440ffa6b6c8a3cc960
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 0.9994

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://dugedepap.ru/wix?keyword=download+gta+5+mod+apk+%252B+obb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421943/normal_600a03a2e0cfd.pdfIn PDF document text
    • http://nokilibetajew.mywebcommunity.org/assemblies_of_god_ghana_constitution.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/37487831707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_6022b403b2697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_60584fbdb2ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_601a3b5fd8905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_60391e13d73cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480750/normal_60564abd51896.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/tigivokejematedazegin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_04c3aef86e2c4fe5996a02a1129e3b9a.pdf?index=trueIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_288e1ead2bcf4f3d8f2c16610beefb8b.pdf?index=trueIn PDF document text
    • http://feramivo.rf.gd/phn_mm_tch_file_min_ph.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/safety_data_sheet_validity_period.pdfIn PDF document text
    • http://lexegeverurejeb.rf.gd/g_shock_g100bb_fake.pdfIn PDF document text
    • http://wifofevowogak.onlinewebshop.net/42464562122.pdfIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_1ff3f2df8eea4d869f67eb135331334d.pdf?index=trueIn PDF document text
    • http://gezixerigalejeb.rf.gd/fulefo.pdfIn PDF document text
    • http://lometazojubusi.rf.gd/10618362082.pdfIn PDF document text
    • http://gamojeliziri.rf.gd/73664356995.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/odisha_weather_report_news.pdfIn PDF document text
    • https://b9387e75-0942-48a6-8a47-0bd3f0224277.filesusr.com/ugd/fc485c_83edd671bfba4252abfb29ce506cc7bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegebunov/osrs_mahogany_bench_guide.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_23ce8e9f1d0346c7bdb0d89d4c8e3b0f.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_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 5424 bytes
SHA-256: a066f809d4e04c366e06abcdec5520b669bae189f752dc5d2572dd14330bf6ca
font_01_sfnt_off0000fc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 22048 bytes
SHA-256: 67ae25c3354c5489003e786c1b63d1bb75cc2ef0046b6a5a68656044f08a1102

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