Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4018266b0b0176…

MALICIOUS

PDF

81.6 KB Created: 2021-03-12 04:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d9bd4e71d9f55b2bbd980d9904be003b SHA-1: 9bfae6effe2f7577a6cb4f52832de33e339a14a5 SHA-256: 9c4018266b0b01767979d4c1fffc90c3390c269687e461f6bc04c3a4f90b9a80
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=slack+app++pc In PDF document text
    • http://xegazinijitup.mywebcommunity.org/lamborghini_diablo_2019_preo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5feefbfb1b4d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_600c7495acba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5fe122c2b072e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fe3baa683d51.pdfIn PDF document text
    • https://fugebigejajifad.weebly.com/uploads/1/3/1/4/131406613/f909d9a0e888b.pdfIn PDF document text
    • http://nawukebakesejid.iblogger.org/anamika_movie_song_in_320kbps.pdfIn PDF document text
    • https://nedugapepo.weebly.com/uploads/1/3/4/2/134265444/1574853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd1c190d8f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_603e725b3b61e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b0c19b819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_6037dda4086e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_5fd67f59d646b.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/pokorevalaxex/kufurulazasez.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/admission_form_for_class_11_in_guwahati.pdfIn PDF document text
    • http://gekuvilis.epizy.com/5395972927.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/livixom.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/schaums_outline_of_college_physics_9th_ed_solutions.pdfIn PDF document text
    • http://ditanumugagoma.myartsonline.com/loboju.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_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 4820 bytes
SHA-256: c8b1e53117682e8bfa4d6ec105441cf5b486f0cb9efe85526e4cd9f21cd00447
font_01_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 11576 bytes
SHA-256: 0da0c5693a3c35f6f0d6277f9610c5a2f07d89aff89c82f213f4abb7b5e230ea

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