Malicious PDF — malware analysis report

Static analysis result for SHA-256 48aff42fe56fc9dd…

MALICIOUS

PDF

85.0 KB Created: 2021-02-17 21:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7ba2353eabab6310a1db85cb79c46c85 SHA-1: 99f29cd909f37a16b9ac372066aa471f461ab724 SHA-256: 48aff42fe56fc9ddfc522cdb184f52be9469d607fafbf2570fe2003bbbd2d6f5
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=how+do+i+find+my+hp+deskjet+2545+wifi+password PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5fd6675a01117.pdfIn PDF document text
    • http://hookup154.fun/police_chase_las_vegas_nevadaz83zv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465388/normal_5fee7e40214b9.pdfIn PDF document text
    • http://myyshooop227.site/dragon_age_inquisition_official_strategy_guidenaa54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_60117a70b748c.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jfNsMgg/jadwal_dunia_games_pubg_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/bhajjgc/68242699771.pdfIn PDF document text
    • http://closemaze.com/213702832545v2wv.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/jiy8ja3/xivunijogafejitegunadimag.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/ZNw3tjg/36676135173.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/HgeYzid/sivuwe.pdfIn PDF document text
    • http://casser.xyz/parabatubepikatazalicxbq3.pdfIn PDF document text
    • http://genoray.pro/2366194026049qku.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/uqjbjip/zodonukexigixiludozuditun.pdfIn PDF document text
    • http://ijmalan.xyz/schema_branchement_demarreur_tracteury3fbk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_6018d75e140f2.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/hjfjcrG/53573443876.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/cKgjigO/marofogevepomijupavo.pdfIn PDF document text
    • http:///:192.168.1.101In 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
    • 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_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 5676 bytes
SHA-256: 849bd37cc5b960381dae6c850d30016466989df306aa6b1e1c086604d548c927
font_01_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 10944 bytes
SHA-256: a8d8065268e8c42bc8e91ed9d8fd0978c9a827ce44e0d50950adc7238016ef75
font_02_sfnt_off00013843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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