Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9eb075877a9a57…

MALICIOUS

PDF

69.5 KB Created: 2021-03-30 15:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eafb38f4f258eabe97e5b73180e406ae SHA-1: 14529b858e4c8aa776c978c19d63f9176ce7d04e SHA-256: da9eb075877a9a5775126326e6ef9cd8c389074414c108d528a8b04226e0bf2a
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 0.9959

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://soxebez.ru/aws?utm_term=similar+triangles+worksheet+grade+9+with+answer PDF link annotation
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/mapadepatofodop.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/ghaEzdp/code_studio_top_websites.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/14410400442.pdfIn PDF document text
    • https://nemanuvipiza.weebly.com/uploads/1/3/1/3/131398236/eb2a5109c7945.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/audit_report_meaning.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/foxivatarelajifube.pdfIn PDF document text
    • https://foniliwis.weebly.com/uploads/1/3/2/6/132695455/fulib.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/6170410.pdfIn PDF document text
    • http://gupirigugorixuf.sportsontheweb.net/basics_of_electronic_components.pdfIn PDF document text
    • http://vevapefin.sportsontheweb.net/a_travs_de_la_biblia_myer_pearlman.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/egJjhEp/fesadefokedaxinolofiki.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ic8RG8Q/98822811443.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/TnCEKFA/zizujake.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/39350156432.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/dazutun/derivatives_of_ln_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b8c1bc-8362-4ff1-bb1f-ae04b5cce5eb/how_to_use_f4_in_excel_on_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/3736597956.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/pastors_housing_allowance_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/69103607783.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/wizokajosomunujiwunisoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b6f6dc3-e25a-4fb9-b808-889583da97e6/peavey_classic_30_ii_footswitch.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/bernina_artista_170_original_price.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/62833091991.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/90120565029.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/red_storm_rising_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e13523-4f4b-4e62-8639-934ef39b8ccf/how_to_trade_penny_stocks_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/aotus_lemurinus.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_off0000d131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD131 5652 bytes
SHA-256: 204d44adf345f5dcfc90845aefe47bff1ea279ee33076d6913ee8cb406da61c3
font_01_sfnt_off0000e445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 10380 bytes
SHA-256: 9149a0b16af00ca6f415b9c4b2329491782d4415fac7b51f8ecfb30915fe385b