Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2d80fde318f8d9…

MALICIOUS

PDF

78.7 KB Created: 2021-05-14 11:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4b9160b9f8a51381caa1176b9886f008 SHA-1: e8cacbe8de8241e328aa04fd056d2d79943505f4 SHA-256: 3d2d80fde318f8d9d6324957917529c9fc7807539c1067d77c6d321d325d5273
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=stanley+8+gallon+wet+dry+vac+accessories PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379615/normal_5fdfa3eb461a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_606c5cd9f073f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_60403af0dd6cb.pdfIn PDF document text
    • http://vofigasu.medianewsonline.com/the_heart_of_centering_prayer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_601f940677e11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388432/normal_5ff926a268946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_602aa72156438.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/ashton_sanders_wu_tang_clan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5fc880e3315cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_605222e199a96.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/metal_alloys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ebcc33-74fa-4b87-ac62-9d05051d0a9e/un_mundo_feliz_de_aldous_huxley_analisis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084438cf-12f3-4930-a2db-60d61702d99e/65391586911.pdfIn PDF document text
    • http://guligakifiw.epizy.com/ashtanga_primary_series.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/1860424467.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/24730028054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9985bdd6-2a83-4a56-8823-aefc3d0c9d0f/grammar_worksheets_for_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/fodezirepevoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6484d6-e2ba-4af7-943b-915a0db01fe3/mamedubitil.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/18326392420.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/college_graduate_resume_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/70714660544.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/julewemipu.pdfIn PDF document text
    • http://fopiperole.epizy.com/radilugavijuju.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_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 5656 bytes
SHA-256: 46dd05ef49f618b0c591c0dd8fe8d43d2b8f4026c246e915247cc242d8a29398
font_01_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 10784 bytes
SHA-256: ae61c0da7077d1a1652c1cf475504ba76ef4c231a24ba4b0baa6152715feb492

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