Malicious PDF — malware analysis report

Static analysis result for SHA-256 2959b00cee94e4dc…

MALICIOUS

PDF

75.0 KB Created: 2021-05-12 17:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f699aa5b76edd4304a7206e20d657cef SHA-1: 7525da263f39f3c8af84187be5fb88bfb33f0950 SHA-256: 2959b00cee94e4dcd7be58d595a75f4720209fe57ca86bbc445c476f58452868
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 0.9992

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://seumenha.ru/strik?utm_term=does+lowes+sell+garage+doors PDF link annotation
    • https://cdn.sqhk.co/juroniwubiji/gjH7Tjc/nccn_guidelines_thyroid_cancer_2018.pdfIn PDF document text
    • https://xebolusuzibukun.weebly.com/uploads/1/3/4/5/134506512/laxalugomamu.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/eigibjh/ravensburger_puzzle_1000_disney_villainous.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/gafuturujozapux_bizod_vodad_jikibujetoradig.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/efvhdK0/zupodebumuvol.pdfIn PDF document text
    • http://docita.fun/roku_tv_deals_black_friday_2020mx0gg.pdfIn PDF document text
    • http://bonusiotsbera.online/tinefududegodixonimelodof5prhb.pdfIn PDF document text
    • http://detonic-buy.website/dojijabedunb8to.pdfIn PDF document text
    • http://bloomwithdeanna.com/4390227771002etv.pdfIn PDF document text
    • http://lamovingcompany.com/wikadakagooss7.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/477551.pdfIn PDF document text
    • https://silolezozuwagu.weebly.com/uploads/1/3/0/7/130774999/lokitosarowija-sorer-rejanilada-towusa.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/difigomisosak/57043362472.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/introduction_to_bioorganic_chemistry_and_chemical_biology_solutions_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/nukodetikemogexumowuvoj.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_def1cce3e0164bb99a46104f73d3f043.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daxemo/lelifavujidonu.pdfIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_2816d6a2b64743c094458352d1c88dfc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugumeb/shop_vac_quiet_series_5_gallon_2.0_hp_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/corrugated_fibre_cement_sheet_fixings.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/animes_orion_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/mathematics_questions_and_answers_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/the_critical_path_of_a_network_is_the.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_off0000e81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 5084 bytes
SHA-256: b62348eba64446fe690d8fffc215cce6aa86750df0e94ee8a62161d465bf9012
font_01_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 10364 bytes
SHA-256: 77d79466e8a46387635ffd21a21f5469d6becb9b174b0a03bd4aa889629d31d9

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