Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1500924572fe3c0…

MALICIOUS

PDF

68.4 KB Created: 2021-02-14 09:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d2987a4970a92c1cd1ed20a5c4e497b SHA-1: 9161f0bb48441883d3ee8fc832caa1708001cdc6 SHA-256: e1500924572fe3c0523239ee94ea82cdd584abce76e503db47cf298a4e5b27c0
156 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/aws?utm_term=skyblock+map+for+minecraft+pe PDF link annotation
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/kalojokewabi.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/3154796.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/f8c1a.pdfIn PDF document text
    • http://cardioactiveufficiale.site/50011393986paq4e.pdfIn PDF document text
    • http://spindlndou.space/minecraft_1.4_0.1_apk_indiraubmg.pdfIn PDF document text
    • https://rokawutavepuma.weebly.com/uploads/1/3/0/7/130776645/5259780.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/1725687.pdfIn PDF document text
    • http://lolkek.xyz/41395275901l0zkj.pdfIn PDF document text
    • http://tikovg.xyz/fexevokarusadqdj1n.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/sikuva/rixis.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/raporidedur.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/linksys_xac1200_setup_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/figov.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/acoso_laboral_que_es.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/gameboy_advance_emulator_apk_games.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/rakixevasojiwuwumaxat.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/wogivulodewufu.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/fda_real_world_evidence_guidelines.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 5392 bytes
SHA-256: 0a451d23d09e73dfc9b5c696cea2d6e360ac61f520f11f1ba1534a051c6e85f3
font_01_sfnt_off0000e1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D5 10192 bytes
SHA-256: f126a76be2ad0313f0c039f272db6bb9abb82d335e850b5dc95053bd683ae2b9

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