Malicious PDF — malware analysis report

Static analysis result for SHA-256 09658e6666f7b205…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 20:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c58b1faadecae9189fce746e6b91c7fa SHA-1: 1a48f155d14b40d99a55fb9a891fd0d7dbdec32a SHA-256: 09658e6666f7b20581adf624036ca69e3c81baa5baf9deb7f4cb243820edd131
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL associated with phishing lures, specifically mentioning 'sag aftra pension forms'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of an external URI within a PDF, coupled with the phishing context, suggests an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/wb?keyword=sag%20aftra%20pension%20forms PDF link annotation
    • http://reduslimitalia.website/fojofu20soo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483354/normal_5ffbeab28db17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464319/normal_5fe97f162b62f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_6020cc772ed4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5fff0496d3aa8.pdfIn PDF document text
    • http://vashastrahovka24.ru/bts_quiz_guess_song_by_tuneuo8sl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426820/normal_5fe3b0bf25940.pdfIn PDF document text
    • http://bioforcecolumbia.site/28818327191ey1p2.pdfIn PDF document text
    • http://timecodes.net/143927627216zy6v.pdfIn PDF document text
    • http://geleostone.online/12078034757b6ka4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469847/normal_5fc8dbb4e40aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_5fe714617e4cd.pdfIn PDF document text
    • http://creamwalls.space/game_guardian_mod_apk_201983ozn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/aayega_aayega_sajan_song.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/app_store_official_apk.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_off0000de6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 5292 bytes
SHA-256: 6b463235d2b29751ffd04e1a92f6ec05d7266d0da4b764e0552e22df85cb789e
font_01_sfnt_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 11396 bytes
SHA-256: f694358b6fb04da80a7b8c13a52a16a1bf7ac2b7879c691573b589f48aaa2bf9