Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df2f08ee5a5889f…

MALICIOUS

PDF

70.4 KB Created: 2021-03-14 06:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6a6c085d4d35e61ebb1ca73345e3bdd SHA-1: 16b33ab36ea6d8d00549c56ce99636a76cf42be3 SHA-256: 1df2f08ee5a5889faea196588556345e4e761ec0aa7ff784ee7732f32738d338
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to PDF files hosted on link farms, suggesting a phishing or SEO spam campaign. The document body, though heavily obfuscated, appears to be related to an IPL cricket schedule, a common lure for phishing attacks. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=ipl+2020+cricket+schedule+cricbuzz
    • https://cdn.sqhk.co/dixejetafap/Iufmje2/ludazebijesa.pdf
    • http://noncomform.space/79304282523up4xh.pdf
    • https://mamonesobekemi.weebly.com/uploads/1/3/4/3/134320903/rutuku_fuxomafuzoxi_janevuk.pdf
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5fffb781afe73.pdf
    • https://pulogumofus.weebly.com/uploads/1/3/0/7/130739416/f1207c5cc74c5f.pdf
    • https://viwefinorix.weebly.com/uploads/1/3/0/8/130813514/0c2f55.pdf
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/5904871.pdf
    • https://cdn-cms.f-static.net/uploads/4406516/normal_604cc1ed569e5.pdf
    • https://sajakuvidosub.weebly.com/uploads/1/3/4/4/134496924/nirefodeminikodo.pdf
    • http://yachts-4-sale.com/goxedamizudufolif5gf9.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_6037fd2768d42.pdf
    • http://cryogen.me/global_business_today_10th_edition_proii9.pdf
    • https://cdn-cms.f-static.net/uploads/4366369/normal_60468201499bc.pdf
    • https://cdn.sqhk.co/midijanere/QheieH6/skydrive_inc_stock_ipo.pdf
    • https://cdn-cms.f-static.net/uploads/4414156/normal_601bb49b70ead.pdf
    • http://peskomment.ru/how_to_play_riptide_on_ukulele_tabs4li2a.pdf
    • https://cdn-cms.f-static.net/uploads/4426953/normal_604ba8ec45361.pdf
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5fe0fcd6251d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/budovewesekaz/will_i_fail_a_medical_with_high_blood_pressure.pdf
    • https://s3.amazonaws.com/lodazojamuva/ankylos_implant_system.pdf
    • https://s3.amazonaws.com/nelizenejakarug/loan_amortization_schedule_excel_2007_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4cc.bin
33e28fe8a466a4cd62a920a45107ba99a07519e6ddff55dcf17b47529cc34fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 5416 bytes
font_01_sfnt_off0000e735.bin
5b1f6a78178cade1c699372c1888339ecb664ce182e2a9eb15a45da970068f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 10744 bytes

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