Malicious PDF — malware analysis report

Static analysis result for SHA-256 e053a9c28dfbcdc4…

MALICIOUS

PDF

76.2 KB Created: 2021-04-01 20:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8915d006e2cbb457bbdf3ebc538b4e SHA-1: d1d7207ace2ee13db3f609f8b8275e38895d7ea3 SHA-256: e053a9c28dfbcdc4fb841b1eb205f70baadc1bd2c57d756834407b43b1adaaf4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that contains a large number of external links, many of which are associated with advance-fee scam lures. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests this intent. The document body is heavily obfuscated, but the presence of URLs and the heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ponafet.ru/wix?keyword=2018+cpc+study+guide+pdf
    • http://xabidewukolesas.66ghz.com/hack_driver_question_answers.pdf
    • http://tajawuxelefa.22web.org/paxeb.pdf
    • http://beveram.66ghz.com/justin_bieber_boyfriend_song_djpunjab.pdf
    • https://fudexevanege.weebly.com/uploads/1/3/0/8/130814713/guvodifata.pdf
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/2999237.pdf
    • http://vafutixon.22web.org/tisipilevemudosonumekudaf.pdf
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/pimadifavili.pdf
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/e1105e.pdf
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/1141601.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0652103c-4946-4d31-8a2f-f28bd3bc9fba/how_to_operate_jitterbug_smartphone.pdf
    • https://uploads.strikinglycdn.com/files/ee499d18-7519-4387-a571-9a33152df20f/puwigal.pdf
    • https://uploads.strikinglycdn.com/files/7d9b06c2-d97a-480a-ad52-d78349af0e40/xalepinobepobujigivote.pdf
    • https://uploads.strikinglycdn.com/files/433315a9-b8a4-4382-a8b5-e99483b19166/are_all_the_old_gods_dead.pdf
    • https://s3.amazonaws.com/fizufapu/75145803684.pdf
    • https://uploads.strikinglycdn.com/files/ce7aad8f-5ecd-4ba4-b0d5-fe188e5688e3/nyu_winthrop_occupational_health.pdf
    • http://zepurudevivo.rf.gd/analog_electronics_interview_questions_and_answers_free_download.pdf
    • https://s3.amazonaws.com/wuxupewu/black_and_decker_coffee_maker_instructions_manual.pdf
    • https://uploads.strikinglycdn.com/files/ce3e17ad-da77-4de6-85af-8cfb29dabb8c/yamaha_mg10xuf_mixer.pdf
    • https://uploads.strikinglycdn.com/files/a63b3748-77cf-4cf0-bf36-28909b70b990/49772448689.pdf
    • https://s3.amazonaws.com/wegemebufojafak/47741467358.pdf
    • https://s3.amazonaws.com/pogolo/kuvujugasixuzubiviza.pdf
    • https://uploads.strikinglycdn.com/files/5aa1425c-833d-4a7c-bca4-3ad69690236f/como_desarrollar_la_inteligencia_emocional_en_los_nios_libro.pdf
    • https://uploads.strikinglycdn.com/files/e298f500-d7a7-48f4-87a9-0a3ea0f53dd4/manual_de_gramtica_inglesa.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_off0000e79f.bin
8b4f29977c7325e5b0385e1395778866527e2309be9201a12f29e2c9b233c6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5512 bytes
font_01_sfnt_off0000fa8e.bin
1dc1753b515ee98b19ea9781bc80b64493c371ff4fb95a8c5de426124cbd5740		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 12144 bytes

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