Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c8551eef8220a8…

MALICIOUS

PDF

81.5 KB Created: 2021-02-24 22:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e61cd54c720a3f9073c66568103d961 SHA-1: e631fe5f437ddb9942873d0baabe4f8faabbf1dc SHA-256: 31c8551eef8220a884a83646007cd4b49d9faa975edc59f9f3869416d603622c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs leading to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'love sonnets' to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=love+sonnets+written+by+high+school+students
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/tidosofewegodanafo.pdf
    • https://wujabadatudipox.weebly.com/uploads/1/3/5/4/135400083/mavate.pdf
    • http://barajofa.mywebcommunity.org/how_to_program_seiki_remote.pdf
    • http://davupopebuwiser.sportsontheweb.net/peselopufobituvofugeke.pdf
    • http://sawemawe.mywebcommunity.org/64626333733.pdf
    • https://static.s123-cdn-static.com/uploads/4424953/normal_6003b9a2c22b6.pdf
    • https://static.s123-cdn-static.com/uploads/4405413/normal_5fe5fb0c05650.pdf
    • http://siwelulatur.22web.org/48791255992.pdf
    • https://static.s123-cdn-static.com/uploads/4457272/normal_600279e1eb1fc.pdf
    • https://cdn-cms.f-static.net/uploads/4402032/normal_602d510e35ec1.pdf
    • https://cdn-cms.f-static.net/uploads/4490250/normal_602514ebeb6ac.pdf
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5fda0e30c4149.pdf
    • https://cdn.sqhk.co/gotofebelu/Tjapiul/bike_race_2019_kannada.pdf
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/39a0ae96c9.pdf
    • https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/xelavutotav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jowuwivipi.rf.gd/79213309093.pdf
    • http://wulibazosuxib.onlinewebshop.net/favorelalokejur.pdf
    • http://tifukoleg.rf.gd/how_do_i_set_my_lg_washer_to_spin_only.pdf
    • http://vobisobopimab.epizy.com/api_platform_cloud_service_management_portal.pdf
    • http://somifinufax.rf.gd/ruzutarexedilabevegulaj.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_off0001015a.bin
2c8689e08771192f58e6a4cb0ceb71e8e19a6a88b603b6484334c3ab7ca90e7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 5324 bytes
font_01_sfnt_off00011391.bin
6d0da5c9e7a4c39f106d169228991d8516b614ca7ce03402a31457a56ef2e756
pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 10776 bytes