Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42b794082d191f2…

MALICIOUS

PDF

75.1 KB Created: 2021-02-21 13:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a305babb7b07cd23d6eba361f59e31b1 SHA-1: dee0b8450926ba0455713820a1748507f3361ffb SHA-256: a42b794082d191f2803330a3d1f927f12414b1c70632a67d3fbd1396bc9930cf
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=why+did+gregor+mendel+use+peas+in+his+experiments PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5fdc7807d687f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_6017a0dd8f67b.pdfIn PDF document text
    • http://letnesil.xyz/kevanorurabufezewabiximnknop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_602064b242930.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/4ajcQdD/30636779816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454164/normal_5fe51dc449906.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/MClXij5/wosidaxopamibo.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/fjahcig/sulolofos.pdfIn PDF document text
    • http://tendernes.ru/vuzukesurarekufuwotazoxif5n118.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/bhdAigj/ice_hockey_games_online_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_6015cc912aeab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 5556 bytes
SHA-256: 3ffb8814931e2ac2e6837717023f51cfc320705716cdff587f5166b236650032
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 10124 bytes
SHA-256: 301baed6988b6297f4a6736509ba069c995caec6bee6ca31f4fe567cc2eb189d

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