Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fe0d46ffbe566f…

MALICIOUS

PDF

74.0 KB Created: 2021-03-02 17:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a1126a4fabd5978bdab314ca69eb19ea SHA-1: 6f8e8dd43b62951ce4bee5b129fcd84a7d2c987d SHA-256: 27fe0d46ffbe566f051f1e05ac5420ffda403f1c33ccba59fb8177d1703dcc0b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs disguised as a download for a popular audiobook, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites.

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://jottigo.ru/123?utm_term=scott+adams+how+to+fail+at+almost+everything+audiobook PDF link annotation
    • http://riniwodifole.medianewsonline.com/discuss_the_salient_features_of_romantic_poetry.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/remutojalumexamenib.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/fOfhcif/dafipusazawef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_601529915be9c.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/fomekeleseruwabigitibugab.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/gVgegfD/93190407394.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/thhxie8/download_microsoft_launcher_for_android_apk.pdfIn PDF document text
    • http://paselon.getenjoyment.net/xazexewibesupixidolasog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_601eddac040b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_602d6889ce229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475203/normal_5febeb5f60c8d.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/igfhajf/jilifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464851/normal_5fde496694216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/plagiarism_report_for_research_paper.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/54125541498.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/vacuna_antirrabica_en_perros.pdfIn PDF document text
    • http://mawokale.myartsonline.com/what_is_service_oriented_architecture_example.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/old_school_rectangle_pizza_recipe.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6F 5996 bytes
SHA-256: 5ff97741f99f35df8da3929996937b4573e0a89df2651a068bbd37ab2a953d21
font_01_sfnt_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 8568 bytes
SHA-256: 3b35ab148c16c13c484dfaf934d6de8a6503222e61569ffa8632d02876b8c499
font_02_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 10104 bytes
SHA-256: e9ae3e6358ecbdd8c95cdfedb2de73dffc17a14095b6786e067d1892bf065d69

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