Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3dfc0d9cc4225dd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-13 20:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 21a3f7dc40ed2ccc2c61d8b6d831b1f6 SHA-1: cd2dcf0b08d98e429ebf5cdcc7e0a4532b4676d2 SHA-256: c3dfc0d9cc4225ddf819c28c23bc242a94d60c7dc13392ee76d9bed569a9ca3a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/wix?keyword=pokemon+xd+water+pulse PDF link annotation
    • http://mazafaka69pussy.online/silicon_valley_season_6_dvd_ukkilho.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6025c50e0de31.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/tatup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601d68c08ccbc.pdfIn PDF document text
    • http://amsidgi.xyz/how_to_become_a_spy_cia06830.pdfIn PDF document text
    • http://matteset-spon.space/nenixem0ms2.pdfIn PDF document text
    • http://stav-games.ru/saxumbqcpq.pdfIn PDF document text
    • http://alcozerox.com/36998904453odyne.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_c3e0c935592f4ccaa89ef4ffaa88e9b7.pdf?index=trueIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_fbb88091f794486ab35b904f8d68793d.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_34377b28c1eb48eb8a462196ec8937bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/bibosevamerubenodagala.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/ged_math_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/improving_vocabulary_skills_answer_key_chapter_3.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_31f1c199435a47f0b6b5df392b876df7.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_f373824fffb24de981e23ab2c7f91f89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/67758145594.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/domufideganulipasokepalul.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/el_conde_de_montecristo_pelicula_completa_espaol_latino_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/fuvakupazuzezadugazepose.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/bhoot_fm_best_episode_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/vuzategukagizopowimu.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/benolubiruvefovuninakeg.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_off0000e942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 5332 bytes
SHA-256: ea56b555504071ba880dacb5f42ff23cc204611f4f70dbb17168921b8cc1a991
font_01_sfnt_off0000fb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 11380 bytes
SHA-256: d5d38fb65314c1b1830c93c01ea27b39fd0e9d07a19933a8eda8373dc1c1e351

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