Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e662ff8d626e09…

MALICIOUS

PDF

86.8 KB Created: 2021-03-18 22:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7eec928051d91eeb5da1d31179e5d38b SHA-1: 946173a0223bcff18bfd7d4dc2100d1e79aca237 SHA-256: 40e662ff8d626e0989c38eb764f28a7238eb32495bcd3039c97ed76154741494
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://lozipotod.ru/award?keyword=activities+of+daily+living+list+pdf PDF link annotation
    • https://joruluzadazalit.weebly.com/uploads/1/3/4/6/134673717/9032143.pdfIn PDF document text
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/rezixazedanununijuso.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/bsc_1st_year_biology_book.pdfIn PDF document text
    • https://xupukowipor.weebly.com/uploads/1/3/5/3/135304830/tamovedowedejed.pdfIn PDF document text
    • http://nivulegojin.iblogger.org/86019833231.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/vusosofase.pdfIn PDF document text
    • http://mitidogifomasis.iblogger.org/german-_english_technical_dictionary_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0cf7a11-afcb-4b8b-9e7a-c9bd00892a0d/nagurimusur.pdfIn PDF document text
    • http://dagoroj.rf.gd/parusezoxerevi.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/83021178275.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/private_facebook_videos_1080p.pdfIn PDF document text
    • http://vitipazapabixu.epizy.com/89838056926.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/fourier_transform_examples_coefficients.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/black_and_decker_battery_charger_12v.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/bambara_kannaley_video_songs_free.pdfIn PDF document text
    • http://misiwoferejisuj.rf.gd/75770915941.pdfIn PDF document text
    • http://lokemuwebofeg.rf.gd/tagenud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866df70c-6e5f-43a6-b8c3-5abd6c51f261/32818316405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613afdcd-0af4-40e8-8340-079ee6d3e3b2/49292030086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d78ef47-51da-4ff9-971e-f7754de35cd9/focusrite_scarlett_6i6_2nd_gen_driver_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ae5f9f-37ee-46bb-99b0-c7e0c196783c/final_fantasy_xiv_online_ps4_free_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/64668094048.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_off000112ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BA 5380 bytes
SHA-256: a282869f754c46625295a9c30bed7ea95cbfab1cdf60838dde38a9696528a05b
font_01_sfnt_off00012535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12535 11796 bytes
SHA-256: c99cb8a81f75a11d24e28e20f980bd1022e5c302352d1fca8b390b94bede4377

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