Malicious PDF — malware analysis report

Static analysis result for SHA-256 78062f7c3f201303…

MALICIOUS

PDF

73.5 KB Created: 2021-03-23 05:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 15212dc44278ba7f5317a451dd6c1bce SHA-1: 025797c29714c21afaecdab34751bcca5c622226 SHA-256: 78062f7c3f2013033376f3dd8c28d0fd5d8ab803f640a5c5865efcfef95407a3
104 Risk Score

Malware Insights

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

The file is a PDF document that contains a heuristic firing for a download button lure and an embedded URI pointing to a suspicious domain. ClamAV also detected this file as a phishing trojan. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=acls+course+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/somisafeg/imJbgeW/snapseed_editing_app_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5ffb5a885c6ea.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/gSibjfH/flip_diving_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_60135981274d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_60265dd1a2751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fe73fa45e533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_601df41da1c57.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/jge3EPJ/mesego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424666/normal_60014bec0f1cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_603754ef645dc.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/j6ge491/minizosajebavuxeliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_6015a9071421d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_6013478f72211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420586/normal_5fc92d7bbc06c.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/hfbhhid/vebapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_60039099b5d16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5fefb99d84e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6022d9e831d06.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/eijhfPD/36671166070.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/bizamesuwepe/capital_group_new_perspective_fund_lux_factsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/various_polymorphic_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/house_decorator_and_painters_guide.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_off0000e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 5288 bytes
SHA-256: 8d7ebce22912e78c0b164671419adb97102d1108976afbc06e6808e53819b6ca
font_01_sfnt_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 10828 bytes
SHA-256: d6f240d5ea33554b543ee979f7f3077ffff47596847bbab69685c632cc49077e

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