Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bcefd7bcae1ecf…

MALICIOUS

PDF

77.7 KB Created: 2021-05-06 01:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73dc63b6773f372a9731a2bb278cd68d SHA-1: 2fb7db6e373b88ef1251f156cb8e1ce476170ca8 SHA-256: e8bcefd7bcae1ecff2db8cd7e9fe9edc3ad433c4965c1143d92809edfb6507fe
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this PDF as malicious, specifically as a phishing trojan. The embedded URL `https://botokaw.ru/strik?utm_term=conflict+resolution+exercises+for+high+school+students` is the primary indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=conflict+resolution+exercises+for+high+school+students
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/47ed03092.pdf
    • http://pakunobun.getenjoyment.net/how_to_clean_rubber_water_bottle_mouthpiece.pdf
    • https://dubamuxurel.weebly.com/uploads/1/3/4/4/134463085/216b967.pdf
    • http://tixokapine.mypressonline.com/airmen_y_group_model_paper.pdf
    • https://jodemugibinid.weebly.com/uploads/1/3/5/3/135347277/1e1cc63.pdf
    • http://resokipuga.getenjoyment.net/contoh_joint_venture_agreement.pdf
    • http://dorulezebum.sportsontheweb.net/pedubitubeloroxaninoro.pdf
    • http://fikosarodone.medianewsonline.com/53057324317.pdf
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/9530060.pdf
    • http://jefuvumerusew.getenjoyment.net/wakewiwazalifelepib.pdf
    • http://depusapo.mypressonline.com/excel_beginner_course.pdf
    • http://dududuw.mypressonline.com/221997498.pdf
    • https://pitidupokeni.weebly.com/uploads/1/3/4/4/134485339/wixufo-fegaxanu-nitisule.pdf
    • http://nemosixumeki.mypressonline.com/mariage_d_amour_piano.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/120de1cb-eaf2-4ba1-84bc-0fd20683833e/fupemejaki.pdf
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_b507e755eab94a83bbc7d3ac3985173d.pdf?index=true
    • https://s3.amazonaws.com/luramamelolem/basel_3_accord.pdf
    • https://s3.amazonaws.com/buwosevax/how_to_turn_on_hot_tub_heater.pdf
    • https://uploads.strikinglycdn.com/files/a73c8156-df09-44d6-ba88-080e7bbd2d2a/wegazuluvububiwasadububum.pdf
    • https://uploads.strikinglycdn.com/files/c461f59c-05f2-4048-b1dd-c0171c21ccad/senuzum.pdf
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_70b51d93c53f4dc59ede7f15e5b23584.pdf?index=true
    • https://s3.amazonaws.com/nojemi/what_is_mouse_2_on_mac.pdf
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_38a39c47f1b04e3892627a5c1b8881b5.pdf?index=true
    • https://s3.amazonaws.com/pokorevalaxex/75117291258.pdf
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_27b0a5d8f5a041d7b1c68d92e8b43760.pdf?index=true
    • 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_off0000f29b.bin
6afc2c63c47cd8de178fdfedc762212eb959d9e91e34275f31f973b70b04a2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 5048 bytes
font_01_sfnt_off000103c5.bin
53dc7fc748a1c3e254bf028ca23d78d2bce1ef6e675afecff8f3f6319feb566f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C5 10292 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.