Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e59ad19fa63fe9…

MALICIOUS

PDF

106.6 KB Created: 2021-03-31 08:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb1539b138292379750b52f3d34d398e SHA-1: 74b8453549c9382e402ec488728e4f7ce42a1c4d SHA-256: 97e59ad19fa63fe99371921d1a3141577ce514b78e6e6c7ee0ba88974ff8a1ae
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'tratamiento asma pediatria pdf', aiming to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs and the overall malicious classification strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=tratamiento+asma+pediatria+pdf
    • http://wasatosu.sportsontheweb.net/physiology_of_synapse.pdf
    • http://vumamanepu.sportsontheweb.net/golexalewe.pdf
    • http://letnesil.xyz/libros_apocrifos_son_falsosar5l2.pdf
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5fc79b2bf2461.pdf
    • https://cdn.sqhk.co/dibirolinu/gnu8wgd/683318909.pdf
    • http://interior.estate/5135123489ipsgt.pdf
    • https://cdn.sqhk.co/diridenafa/ijIsNjg/assuring_transformation_data_collection.pdf
    • https://cdn-cms.f-static.net/uploads/4487192/normal_600ae5ca58991.pdf
    • http://cabinetshub.xyz/vajozivesanopekufabuz4dpm.pdf
    • https://cdn.sqhk.co/bebiwamulanu/gifjcid/63359930678.pdf
    • https://cdn-cms.f-static.net/uploads/4393034/normal_5fd7d3b372397.pdf
    • https://cdn.sqhk.co/guletema/jdXggij/nottingham_city_hospital_ward_names.pdf
    • https://cdn-cms.f-static.net/uploads/4427267/normal_5fe93cde9bc1a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wapabefizosumi/malware_scan_free.pdf
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_8a172cfc90cc41f9b243153258525d82.pdf?index=true
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_b4328e45cbd84a3e93185ea4ef7dedf5.pdf?index=true
    • https://s3.amazonaws.com/forupokisip/pofajusejogoju.pdf
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_2ffcc11f327344f19d00ce3e9d37904e.pdf?index=true
    • https://s3.amazonaws.com/mexesazaxasa/64576195897.pdf
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_fb76530e32db489b9b19bf3d8240c66e.pdf?index=true
    • https://s3.amazonaws.com/kaxukok/sentry_fireproof_safe_model_1100.pdf
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_6ec335050063480f8cfe58f942c1c670.pdf?index=true
    • 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_off000160e1.bin
116392874be1c8d05f728e831c99ec4473ce4fb47599f083414b9605f692634f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160E1 5104 bytes
font_01_sfnt_off00017223.bin
e3a9064b0e2168240cce5eeb6e54c0c6780f228ba45a3f7e8a7168442e24acc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17223 12508 bytes

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