Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f733b804a77708…

MALICIOUS

PDF

75.4 KB Created: 2021-03-18 18:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35920424fe0b7be45946606ac69d28f7 SHA-1: 59000b623548618999169a42f74ad4c33158f06c SHA-256: c2f733b804a7770844260f064094ddfcca7cd1efd93e523687510775cd12f223
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body contains obfuscated text, but a key heuristic identified an external URI pointing to 'https://maypoin.ru/wix?keyword=skyrim+crash+on+startup+skse', suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of an external URL and the overall detection profile point towards a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/wix?keyword=skyrim+crash+on+startup+skse
    • https://cdn.sqhk.co/pogadidotilu/ZVkhhgf/33737273809.pdf
    • http://fijixedi.22web.org/acrobat_reader_for_windows_10_free.pdf
    • https://cdn-cms.f-static.net/uploads/4421205/normal_6038c80dbfc16.pdf
    • https://cdn-cms.f-static.net/uploads/4426543/normal_603521a9c083f.pdf
    • https://cdn.sqhk.co/lofakekaf/hdo2Nja/kipavolifukex.pdf
    • https://cdn.sqhk.co/xoxujagemo/higcNRj/auxiliary_verb_file.pdf
    • https://cdn.sqhk.co/pufuxogife/heXVnjd/21360029529.pdf
    • https://static.s123-cdn-static.com/uploads/4370780/normal_5ff98cc146903.pdf
    • http://thecet.xyz/euro_truck_simulator_2_free_download_for_pc_windows_7oiotd.pdf
    • https://cdn.sqhk.co/vowibesep/DKNjaij/18367632024.pdf
    • https://static.s123-cdn-static.com/uploads/4368770/normal_60036221397dc.pdf
    • https://cdn-cms.f-static.net/uploads/4370089/normal_60405d86467dd.pdf
    • http://kleomaften.online/p3d_f_16_manualh2q91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sisaxu/2012_hyundai_sonata_wheel_specs.pdf
    • http://podepabat.rf.gd/human_development_index_report_2010.pdf
    • https://s3.amazonaws.com/dosalapasenow/how_do_i_sync_my_fitbit_charge_hr_to_my_iphone.pdf
    • https://uploads.strikinglycdn.com/files/f5633ff2-8b9e-421b-8da5-cee9bc0503cd/digitech_rp200_expression_pedal_not_working.pdf
    • https://s3.amazonaws.com/jagux/adobe_indesign_trial_software_free.pdf
    • https://uploads.strikinglycdn.com/files/14e88ac3-0f4c-4a9e-971a-24d4d873dc8e/25791840791.pdf
    • https://s3.amazonaws.com/xisefowu/asphalt_xtreme_apk_data_highly_compressed.pdf
    • https://uploads.strikinglycdn.com/files/bf22c03a-8ea1-432e-ae52-072520de90df/92933202527.pdf
    • https://uploads.strikinglycdn.com/files/e12014d8-3168-4ec5-908e-fac77f8b003d/vexovuxowor.pdf
    • https://s3.amazonaws.com/xafaxotaful/59313505602.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_off0000e851.bin
d6e6e42a7b8051e98d1336edb6397584ad442966a735c4f3f14cda2b42aabbd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 5408 bytes
font_01_sfnt_off0000fa96.bin
f1f426bda4a944e02f2b452527f9613d42fbb99ab14987cfaaed84b4ee55b5d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 11008 bytes

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