Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aba58aba2f9fa40…

MALICIOUS

PDF

72.4 KB Created: 2021-01-10 01:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ae0e7006de1c1fb16471701dad71caec SHA-1: 6be4c9e0602d4367b43a64c25d93c11fcd02637c SHA-256: 1aba58aba2f9fa406cb8215ebb1b09994b7dd8827144e7738d50d2ee3a50430d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though partially corrupted, suggests a lure related to 'Manualidades halloween infantil arañas' (Halloween crafts for children, spiders).

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://traffnew.ru/aws?utm_term=manualidades+halloween+infantil+ara%25C3%25B1as PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fe846c0a87dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5ff92543d532a.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/1XwFTgG/galaxy_war_star_space_fighters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_5f8ebf7c8387d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f909cb11f016.pdfIn PDF document text
    • https://site-1178227.mozfiles.com/files/1178227/top_20_topics_to_talk_about.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5f999399d8515.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/b7vjauH/75129184372.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/iUP0jgd/bifoxopoveseg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5f93ff45987a4.pdfIn PDF document text
    • https://site-1176489.mozfiles.com/files/1176489/kikudugip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f9ba9d27bfbc.pdfIn PDF document text
    • https://site-1168389.mozfiles.com/files/1168389/super_3d_mini_bowling_board_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 5304 bytes
SHA-256: a141e63b806bacf3dd6afe0094206bccbc7feefe075300717bdb5d34e1fc90b4
font_01_sfnt_off0000ecf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 11532 bytes
SHA-256: 62a0e26b361443ae235cfe9af108391ea763c287e354226c7826856374d0251c