Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfda72499f3c0a8…

MALICIOUS

PDF

79.2 KB Created: 2021-04-02 13:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e49e0776f03f577771651197392d69a SHA-1: b7f7ae09e7bf6d7e43dc80e70be12c5b07ebb453 SHA-256: fdfda72499f3c0a81137aa805d9b08c3750d714eee396da04e6c5f7004a3e562
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting it is part of a link farm or designed to redirect users to malicious websites. The ML classifier also strongly indicated maliciousness. The embedded URLs are likely used to host phishing content or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/award?keyword=sintesis+de+lipidos+en+la+celula+pdf
    • https://cdn.sqhk.co/titesojijuko/gjjverL/nice_short_sleeve_button_downs_business_casual.pdf
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/2a983659e763.pdf
    • https://vopisozojozesa.weebly.com/uploads/1/3/1/4/131407388/mugolumuponepep.pdf
    • http://jivusibofonefud.mygamesonline.org/21519500525.pdf
    • http://ruwazumusef.scienceontheweb.net/steiner_analysis.pdf
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/rasono.pdf
    • https://cdn.sqhk.co/fuludasowipu/hcijZih/arknights_recruitment_guide.pdf
    • http://pewekelexu.mygamesonline.org/camel_production_and_management.pdf
    • https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/3581991.pdf
    • http://mesubogit.22web.org/rufapu.pdf
    • http://kinemulawaw.sportsontheweb.net/how_to_clean_the_keurig_needle.pdf
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/6547727.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_da45845d2eb64ffbaa6799328eeb9688.pdf?index=true
    • http://renemived.epizy.com/46945302585.pdf
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_ffa3bd7f259544818154918ac43b2fcb.pdf?index=true
    • http://pumejusatojajeg.rf.gd/university_diploma_template_psd.pdf
    • http://kofufinaniba.rf.gd/kazemegov.pdf
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_e0f660e9e3cc410a89bed135f6628263.pdf?index=true
    • http://fukuselumetu.myartsonline.com/37221906914.pdf
    • http://favubilojoko.rf.gd/42166460678.pdf
    • http://patitoledoboj.rf.gd/is_the_color_mint_green_or_blue.pdf
    • http://limuzanesaz.rf.gd/contrarian_playbook_free_download.pdf
    • http://josuguremim.epizy.com/samsung_galaxy_note_3_high_capacity_battery.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_off0000f64c.bin
35c3ee4faba12dea8a6421b85f6c9aaf71619a91aac32ef573af8b068f543463		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 5156 bytes
font_01_sfnt_off000107ee.bin
9c42bb7582970756654ffda2519fda2a5cc100602fd77b0407486e924f2373ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 11444 bytes

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