Malicious PDF — malware analysis report

Static analysis result for SHA-256 818d06dbb910c40a…

MALICIOUS

PDF

76.0 KB Created: 2021-02-17 16:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca43dbc9b37e01f55894ba3e6ea9063 SHA-1: 7b67b1bfcf8b60b3c0169c30f66407e5ae841b33 SHA-256: 818d06dbb910c40a850fb6c3d1647621603aeca59a0197da26d135cb4c11babb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=why+isn%2527t+my+smoker+heating+up
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5ff2e608af2ef.pdf
    • http://phulop.store/bebe_rexha_songs_mp4g1pem.pdf
    • http://meetchambre.xyz/tidunaxodatiruparutilodov9hqka.pdf
    • http://mangalvpodarok.ru/sanomonirovuvuxagukut0nk.pdf
    • http://bejegom.22web.org/8632498061.pdf
    • http://tgesheff.xyz/alvida_ho_gaye_song_free6meme.pdf
    • https://cdn-cms.f-static.net/uploads/4365634/normal_601f990cb08c2.pdf
    • http://xiravudes.22web.org/tarian_lenggang_nyai.pdf
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5fe0f396a8f1c.pdf
    • https://static.s123-cdn-static.com/uploads/4416125/normal_5fc88b083a482.pdf
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/df0693ebf6b1.pdf
    • http://greatholl.com/construction_quality_management_plan_templatew0z2y.pdf
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/537609.pdf
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/857821.pdf
    • http://dudipoviju.22web.org/android_games_mod_apk_list.pdf
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/a23a53134e.pdf
    • http://ripuvajuze.iblogger.org/lorem_ipsum_free_website_templates.pdf
    • https://cdn-cms.f-static.net/uploads/4388041/normal_60137f4cbfa42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vodipofasofuf.rf.gd/youku_tamil_movies_free.pdf
    • http://winibivazizi.rf.gd/spring_framework_guru_docker_cheat_sheet.pdf
    • http://benugafudom.epizy.com/bekitomesafejad.pdf
    • http://memaded.epizy.com/dunozidotazuzajurepawede.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_off0000ed15.bin
5faba014ad0366ebc433a776b28c0c465a007dc760b8881dc51c4c379a5ba03a
pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 5416 bytes
font_01_sfnt_off0000ff71.bin
eb14644a84be59059dbe55242997c3a340f44b6749cf0c6d84b000fa3461cb30
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 10288 bytes