Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d04ea93016c2e9d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 12:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2ed1781bc18576bc2d1d0d36fb320291 SHA-1: b073c9b3f724fe8dae34f08620753992bbeb0b00 SHA-256: 2d04ea93016c2e9d56b0fdd51cef08e11073745ec451ea6d4094c4db440dd6aa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'jumiwimov.ru/award?keyword=best+day+of+my+life+essay+pdf', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/award?keyword=best+day+of+my+life+essay+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470014/normal_600628b0b317d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5fd9019642b5e.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/wujonowapagoxumitedaboxi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/AhgjgtL/wubasezo.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/togorusevajub.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxumisi/hljgZhd/short_life_2_y8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_6047c6007533a.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/vaxakozubopivafubaduvivir.pdfIn PDF document text
    • https://sobolone.weebly.com/uploads/1/3/0/7/130775045/e6ab0956e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fc89cdde116e.pdfIn PDF document text
    • https://xekozetona.weebly.com/uploads/1/3/4/5/134508060/5410031.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/cell_stephen_king_wiki.pdfIn PDF document text
    • https://pudisipilusive.weebly.com/uploads/1/3/4/5/134597375/silijapese.pdfIn PDF document text
    • https://cdn.sqhk.co/tojemapimibo/hchhhha/jerosodiwugonewafelobipu.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/realidades_1_guided_practice_workbook_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450145/normal_6022c7abc2543.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/babox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/ziboluzu.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/jurawenijutejif.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/draw_sheets_for_hospital_beds.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/lisbon_tourist_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/customer_feedback_report_meaning.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_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 5244 bytes
SHA-256: f6ccdc596ce9f5dd2dbbad0d23c98b2730fd954b7fd801461e84c703e2c745eb
font_01_sfnt_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 10740 bytes
SHA-256: d91ffce9d82c2814b5c3880f9fb1312d0fd93bf8c9946968f0548ff65b257671

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