Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ea2d45ba77c0f7…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 11:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 516c27e3b356322356d56b91fe61b2fe SHA-1: 48d304d9f23f162a239334ac4099d974e73146b0 SHA-256: 63ea2d45ba77c0f7bb6aa8f9c134cbf3b7ced485bbaa82f63a42d67dbd2fcf97
96 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, one of which is directly referenced by a heuristic firing. The ML classifier and ClamAV detection strongly indicate maliciousness, with the primary attack pattern being a phishing lure disguised as academic content. The embedded URLs likely lead to further malicious content or phishing pages.

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
  • 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://resalured.ru/award?keyword=skripsi+belimbing+wuluh+pdf
    • http://nipawifaxupus.mygamesonline.org/solosumiteko.pdf
    • https://xadarerisisiw.weebly.com/uploads/1/3/2/6/132682239/suvedosobizezidoge.pdf
    • https://nesilinazum.weebly.com/uploads/1/3/4/8/134886609/norewememixi.pdf
    • http://dotenipago.medianewsonline.com/what_is_a_warm_fuzzy.pdf
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/lijulefefamesa.pdf
    • https://static.s123-cdn-static.com/uploads/4421339/normal_5ff8ed3c8f108.pdf
    • https://gesajapuso.weebly.com/uploads/1/3/4/8/134873290/2cf6fc0.pdf
    • https://cdn-cms.f-static.net/uploads/4424953/normal_60104b0864ccf.pdf
    • https://cdn-cms.f-static.net/uploads/4417523/normal_60499ddc46fa7.pdf
    • http://bagomebefekixob.getenjoyment.net/what_is_the_best_4000_psi_pressure_washer.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5fd84c0040142.pdf
    • https://cdn-cms.f-static.net/uploads/4413465/normal_60346f3e7de1f.pdf
    • http://jepumir.22web.org/79950075975.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zufigipak.epizy.com/how_to_use_ipad_as_midi_controller_for_logic.pdf
    • http://muwojes.epizy.com/2007_snowbear_utility_trailer_for_sale.pdf
    • https://s3.amazonaws.com/fevobelijogal/74104253037.pdf
    • http://lelisavebak.rf.gd/pufuridemugazozulekumewe.pdf
    • https://s3.amazonaws.com/mudurixo/self_certification_form_template_nhs.pdf
    • https://s3.amazonaws.com/jozaponi/contact_us_template_html_css.pdf
    • https://s3.amazonaws.com/muxozuvalubi/beliefs_and_practices_of_reform_judaism.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_off0000f1d2.bin
faff412f4e3124e6ce061b72d5993b2e7b548e740c931aa65c816f020024cef9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 5644 bytes
font_01_sfnt_off000104eb.bin
cbe752b5eb49c260c1e9370f8d2376faaf56b36d362f328cf6202fbcd4e67503
pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 10684 bytes