Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6aeb6d10f67ed4e…

MALICIOUS

PDF

80.2 KB Created: 2021-03-21 10:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5786603f944e392f290da45b12884a76 SHA-1: 156632b80ff9ed7f70d7227846843fc5e6cd7d96 SHA-256: f6aeb6d10f67ed4ea982844e454d6c765d37def5bd02dd842d4aade7af963314
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains embedded URLs, one of which, https://golowaki.ru/award?keyword=pdfkit+html+to+pdf+nodejs, is flagged as an external URI. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=pdfkit+html+to+pdf+nodejs
    • http://zekoxefol.iblogger.org/fiwavi.pdf
    • https://cdn.sqhk.co/vejuwipem/IHheYP2/tokaxamutir.pdf
    • https://cdn.sqhk.co/baluwofuk/ILq1hjh/my_cloud_home_app_mac.pdf
    • https://cdn.sqhk.co/vafodagusun/icguYhh/ven_pongal_instant_pot.pdf
    • https://cdn-cms.f-static.net/uploads/4369926/normal_604f4060acf22.pdf
    • https://static.s123-cdn-static.com/uploads/4384459/normal_60062a9d8f849.pdf
    • https://cdn.sqhk.co/tivuzofep/giajejj/mountain_bike_pedals_with_straps.pdf
    • https://cdn.sqhk.co/karadirimose/GMLiieR/derefitanemarujil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zedudo/48149375268.pdf
    • http://zuwewabarabin.epizy.com/gosexerevekilola.pdf
    • https://s3.amazonaws.com/jikopot/96422447661.pdf
    • https://uploads.strikinglycdn.com/files/793b26a6-5014-4cec-a00e-16b6c786c50f/mental_status_examination_sample.pdf
    • https://s3.amazonaws.com/bizamesuwepe/writing_process_worksheets_2nd_grade.pdf
    • https://uploads.strikinglycdn.com/files/be4b9a1a-56ec-4b42-842d-5aeda9368807/fefupamom.pdf
    • http://gixarab.rf.gd/cancer_de_esofago_tnm.pdf
    • https://s3.amazonaws.com/lomogas/ganow.pdf
    • https://uploads.strikinglycdn.com/files/23fd3f97-0274-4cfe-bcba-b8fa913174ea/25082436910.pdf
    • https://s3.amazonaws.com/ruzaganog/acer_aspire_m3470g_motherboard_specs.pdf
    • https://s3.amazonaws.com/falufusu/93590610651.pdf
    • https://s3.amazonaws.com/wizedumi/vmware_vcloud_availability.pdf
    • https://uploads.strikinglycdn.com/files/feba2507-53c4-487f-95a1-d9757c353677/77871907818.pdf
    • http://wuzugimekiwetad.epizy.com/jerifutigakomemazi.pdf
    • http://lenaxepejo.rf.gd/what_is_article_2_of_the_constitution_summary.pdf
    • https://uploads.strikinglycdn.com/files/9eaf0606-c184-4cf7-ba58-4b762d10322d/briggs_and_stratton_725ex_190cc_air_filter.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f612.bin
7933f726f56dbf987da074e630c8f50839ad2f8e789b516b284caf8601754c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 5116 bytes
font_01_sfnt_off00010763.bin
f7a685f64835916a375c63a629c4b1febf5d9976ad98d03487e747e1827a90cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 12668 bytes

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