Malicious PDF — malware analysis report

Static analysis result for SHA-256 e990077a69bb62b6…

MALICIOUS

PDF

79.6 KB Created: 2021-02-09 11:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ba5938a34b9defc866763f36b2d9fcdf SHA-1: a4d824dea7997c07ffb1677f586c577391c543b7 SHA-256: e990077a69bb62b6d353a19bf29611efcda4992c7717af9e320108584ab0b964
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/aws?utm_term=fingerprint+analysis+worksheet+answer+key PDF link annotation
    • https://gemexufata.weebly.com/uploads/1/3/0/7/130739895/53073cf.pdfIn PDF document text
    • http://nnorm-id.com/world_economic_forum_global_competitiveness_report_20098fiog.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/e2b1e533.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/nasonovonamilotoduw.pdfIn PDF document text
    • http://nukels.xyz/balak_palak_marathi_full_movie_480pspn67.pdfIn PDF document text
    • http://usesalle.xyz/formato_nacional_de_busqueda_de_personas_desaparecidas45ukq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/posufij/alikiba_mwana_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/domain_and_range_practice_worksheet_algebra_2.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/sepiborabekezimokemad.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/hypertension_treatment_guidelines_2018.pdfIn PDF document text
    • http://xixujoteb.epizy.com/24896237467.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/blender_full_version_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/ipu_admission_form_for_b_tech.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/horizontal_analysis_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/dajeruvanoxajivijuviw.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/sutomakek.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/92080675390.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_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 5296 bytes
SHA-256: b9a3bbef5b6575f07033a91e534cd80206d5a9310f44d7ba4ed0cd1127955c89
font_01_sfnt_off00010bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC8 11044 bytes
SHA-256: ec21ee66998f73baa97e4d68b92a44d78c8519f34e9f1a3dd96912de05c836df

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