Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f1a5c056a96c73…

MALICIOUS

PDF

73.6 KB Created: 2021-03-25 04:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a33bcd72293a5e40dd73a50f0caee5e SHA-1: 743add68cf8442633cfa3de680bdc393b741aaad SHA-256: 77f1a5c056a96c73bf4aa3ceebcd5d010f7c8a48f01b12e3480b723f847bda22
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 0.9960

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://leonvi.ru/wix?keyword=madison+county+indiana+warrant+search PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fdf11f5b78de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_600fe78fda108.pdfIn PDF document text
    • http://sisefotazu.22web.org/el_capulinita.pdfIn PDF document text
    • http://vajujikelo.22web.org/attestation_d_employeur_web_destine__ple_emploi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fdb1157cb510.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/98508496294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_60183e02a368b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_6000a6e4e27e6.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/rosumafutize.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/48273379874.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pumobopebog.epizy.com/correct_usage_of_articles_in_english_grammar.pdfIn PDF document text
    • http://sekamot.epizy.com/choosing_acoustic_guitar_strings_guide.pdfIn PDF document text
    • http://verekoxamokit.epizy.com/72055675650.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_c1c3c22588c14748bfa5f3f83fa754f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zedilegol/democracy_reporting_international_ggmbh.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/tosozizujokukamewabifol.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_e8e3492e3c644a8caa71924967906ecf.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_85bcccc07bb245f1a1638893f49cd956.pdf?index=trueIn PDF document text
    • http://dosunadis.epizy.com/critical_thinking_journal.pdfIn PDF document text
    • http://dozonox.epizy.com/50999433335.pdfIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_8fd200844f334ed2aab12d9a00535635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/tebivorikuz.pdfIn PDF document text
    • http://xijivat.rf.gd/bisacodilo_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/apus_launcher_app.pdfIn PDF document text
    • http://togaretib.epizy.com/flowers_pictures_wallpapers_free.pdfIn PDF document text
    • http://zuvemodu.rf.gd/knight_of_the_seven_kingdoms.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_off0000e305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE305 5196 bytes
SHA-256: aec0f67fb6e619f003f31425c5dc74a1aeb71e88f80a7f614450b3d098f46e5f
font_01_sfnt_off0000f4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 10524 bytes
SHA-256: 190e0ffca638c411f47b82890e375a2698fe6086f63f22284adeca7d465f6261

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