Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f53f1ebfeccb05a…

MALICIOUS

PDF

79.1 KB Created: 2021-02-15 09:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 57817bf7ef8ca4f3c0d60c38fba93b5a SHA-1: e5417391d1bc3fb73f0f2dd10b5a4d3a38b3fffe SHA-256: 2f53f1ebfeccb05ad07a6a318091e774d48d66a8c00faf7db4d370f539c84fd2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple other unknown reputation URLs are present. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/aws?utm_term=critical+ops+game++for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449783/normal_60292f06d4bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/hjc5Qgj/new_musicals_on_hulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408476/normal_5ff1c03f15a5b.pdfIn PDF document text
    • http://helplnstagramoffice.com/le_grand_bain_stream28b0o.pdfIn PDF document text
    • http://romeita.space/28360423311kz6el.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416305/normal_5feecfd38a7e9.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/ixChdhh/xogafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375891/normal_5feb60acaa79e.pdfIn PDF document text
    • http://ulekschool.online/pilusudozipoxjxsev.pdfIn PDF document text
    • http://pedron.fun/lovely_complex_episode_1_english_dubbed9ke2p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5fcc75fe3d8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_601164b88faf7.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/fhfhfrV/38804370554.pdfIn PDF document text
    • http://bizbize-yeteriz.org/80981536471zqdiy.pdfIn PDF document text
    • http://sexedate69.site/affidavit_of_loss_formqotp1.pdfIn PDF document text
    • http://aycotoro0.xyz/legend_of_heropolis_mod_apk_unlimited_moneys9k7z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_5fcd677b711ea.pdfIn PDF document text
    • http://glawerry.online/avik_sarkar_book_download02ad5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fde904b2f945.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jdifLM5/rihanna_man_down_song_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 5380 bytes
SHA-256: 5e192dffd33d29e601a23d920d1a7715baf86280314918eae32754c48c07abd0
font_01_sfnt_off00010bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 10240 bytes
SHA-256: 358659df174edc63f5a58a549b2d6613a6042d117f9692573631ade8aaa4324b

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