Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e44e6d61de47a0…

MALICIOUS

PDF

74.6 KB Created: 2021-03-16 10:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e03bc98624e183d77ebe8604a56496af SHA-1: d13821d09c8c3e418fbe7cffcc25ce5ae84f85ee SHA-256: d7e44e6d61de47a0d006261a02b605da528e6053a9a544d934ee26206a19e8ac
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://vilenefex.ru/award?keyword=formula+for+volume+and+surface+area+of+all+shapes+pdf
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/4069425.pdf
    • http://fowirunuwajuk.iblogger.org/34558715887.pdf
    • http://zuregazezoral.mygamesonline.org/16290628371.pdf
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/lugakobovujut_zobovusa.pdf
    • https://toxodapakaxoza.weebly.com/uploads/1/3/4/5/134525452/583233.pdf
    • http://getepitisux.mywebcommunity.org/upsc_books_download_free.pdf
    • http://fafuzum.sportsontheweb.net/12177290387.pdf
    • http://bexukavinawexov.mygamesonline.org/classroom_language_in_english.pdf
    • https://miwimuwal.weebly.com/uploads/1/3/0/7/130775744/1614338.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_878522eb7553447f90c98a185d70894c.pdf?index=true
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_3497547434c24461953fae9ef864e878.pdf?index=true
    • https://uploads.strikinglycdn.com/files/283e9e36-3315-4c88-83e7-55599011cf8b/fovatamurutufu.pdf
    • http://sajusujivolase.rf.gd/48892187689.pdf
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_55b4a5643887402fb4f249e4ad9f5cfa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c053f40e-48b6-45e8-b5b7-de5880cdd9b8/39102413036.pdf
    • https://uploads.strikinglycdn.com/files/52674aeb-733d-445c-805a-204c4dd776d1/8889122670.pdf
    • http://rotaduwifomol.rf.gd/chaconne_cello_sheet_music.pdf
    • http://tenovidoxidal.rf.gd/68886348921.pdf
    • https://s3.amazonaws.com/jezaxojipevu/effective_academic_writing_1_answer_key_booklet.pdf
    • http://garulolit.rf.gd/bevemuvowawal.pdf
    • https://s3.amazonaws.com/vokeri/panasonic_6.0_plus_caller_id_not_working.pdf
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_c5866811c3a94f79ab219b439e79069d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9e1facd3-bef0-4aed-a011-6fbfce89f926/how_much_does_a_wood_burning_fireplace_insert_cost.pdf
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_a34bf5ac8cbe4c6c84c2808db2e412d7.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_off0000e39d.bin
048d0383972bbcbe8fd09dae82df90031247e1205e83b1ef33a9b7413786a6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 5408 bytes
font_01_sfnt_off0000f5e5.bin
2c122f9c9687fd56595e0deafc717a9955ebfc13e72a801eeac792d2ff9a83d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 11308 bytes

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