Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd95467e43c1f4df…

MALICIOUS

PDF

67.0 KB Created: 2021-03-30 15:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: da96d5c396b864ebaaae63a2b4755656 SHA-1: 5eafbbc3c881f66438fe63a2cbbe4490ae0ca6ac SHA-256: cd95467e43c1f4df0508281e7d38a58cce40ad78e1989dec018eb5c71ca0ca28
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malware. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to plant research, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=androgenesis+in+plants+pdf PDF link annotation
    • https://cdn.sqhk.co/jotepomi/azFidhf/centipedes_in_house_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/ihQhicz/ximadomenidimopopepopob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_6051059722615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_6021bdf15ed5c.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/hgc4ghm/pop_catalogue_design.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_6019036bcac4f.pdfIn PDF document text
    • https://cdn.sqhk.co/xobetetivuzi/BgehcBG/robitediw.pdfIn PDF document text
    • http://tisigetid.iblogger.org/46693906344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452624/normal_600125cf2820d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af4db73-ac80-4dd5-a510-802395d8bb62/easy_brandy_alexander_pie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d94a33-6f8b-4ee2-9497-a6a4804fa6e0/cuntos_centmetros_equivale_un_metro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9eec2f8-1891-4012-88d2-94a4e764119d/what_does_it_mean_to_be_literate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c702e6f2-bbc0-464a-936f-6809c745f00d/transformers_revenge_of_the_fallen_2009_dual_audio_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804ac22a-13a7-4c7a-99ac-b2a0f03ff14f/84267251327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100270c3-6d13-4a96-bf1c-5a35554f5784/ek_the_power_of_one_mp3_songs_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38371d46-49ae-4aa1-9d9c-40c529fd07d7/gapukujevovez.pdfIn PDF document text
    • http://nepowabut.rf.gd/simple_carburettor_working.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_off0000cb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB11 5200 bytes
SHA-256: 4cb9a2eead885981ec1925fcdcf1d620fdc8f614c665874800f68f6cb762cf99
font_01_sfnt_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 10220 bytes
SHA-256: 2fa07333a0a89f9017aa338f3deb7212838d2a9ce5c33b5a3b8f6254866d8254

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