Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a4e89444f01cc4…

MALICIOUS

PDF

70.1 KB Created: 2020-11-25 16:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7b20613205f22e16362753a96517480c SHA-1: 3595ab8c1481f813beccc39b7f72a4c3d585c0f8 SHA-256: a1a4e89444f01cc4b2fbf127cef1d4fbaddaadf3c2de82776dcc3079ddc87938
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of an external URI and the overall detection profile suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://trafftec.ru/123?utm_term=pre+assessment+ideas+for+high+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f95c44a6e58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5f93e712db4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422908/normal_5fa5a813191dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f9370a0ce201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f871d691b9ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8e1930e4c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f96d38321dd3.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/gadumagabusodel/come_thou_fount_violin_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/82262359694.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/free_smite_gem_codes_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/lavuzenapipagokewuva.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/mortal_kombat_2_player_games.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/el_liderazgo_de_jesus.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/dekasomigani.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_off0000d339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD339 5436 bytes
SHA-256: e21a9f15d857b1e1284c06ff5abb2816e6f35422e77e7b2fd77b6414afc28d83
font_01_sfnt_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 10700 bytes
SHA-256: 06284589822a37e7470633e8bc23f1b7835f370ff24ab95d0395acc008985abb