Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d230d030eb0742…

MALICIOUS

PDF

82.4 KB Created: 2021-03-18 12:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9acd84cebc35fce7abbfedcf9989ac56 SHA-1: 784260099421ea240bcb8a2c65e370fa4bb7f0ba SHA-256: 72d230d030eb0742674b054e04be5a72e26c325b7752efd07f1f77ffb361cbab
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 phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to administrative training.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://botokaw.ru/123?utm_term=formation+assistant+de+gestion+administrative+bilingue
    • http://fredo.run/69239551963hsgmh.pdf
    • http://ruwufuwetoj.mygamesonline.org/75869305201.pdf
    • http://ramifapufebi.scienceontheweb.net/regulation_of_calvin_cycle.pdf
    • http://se-mrush.com/appointment_letter_format_for_auditlqwye.pdf
    • http://1fps.ru/bible_verses_on_assurance_of_answered_prayert6qin.pdf
    • http://alteramaks.world/star_trek_discovery_season_3_episode_13_release_datea2yal.pdf
    • https://static.s123-cdn-static.com/uploads/4487662/normal_5fc5ed25d2f0b.pdf
    • http://phulop.store/76520911008qh0v5.pdf
    • http://jemulobapamiwu.mywebcommunity.org/xibikugozonax.pdf
    • http://myluckybet.xyz/ejercicios_already_just_yetrjnuj.pdf
    • https://cdn-cms.f-static.net/uploads/4418188/normal_604ee6593a24b.pdf
    • http://metazoaapc.fun/formal_email_format_examples176to.pdf
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fec215550282.pdf
    • http://weinmvc.net/how_to_reduce_business_property_taxsaeg1.pdf
    • http://thiswaytovogue.com/75676104412kukkj.pdf
    • http://kprovk.xyz/b_m_w_ki_full_formeevif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3e1dcb79-1993-404e-9abb-a29de50af9be/pipeline_construction_safety_training_course_online.pdf
    • https://uploads.strikinglycdn.com/files/7cb14d9a-c494-4635-a6bc-4c7d28847549/outdoor_key_code_locks.pdf
    • https://uploads.strikinglycdn.com/files/6fea5ae2-053a-4530-bcd8-53f9473f833d/how_to_service_webasto_heater.pdf
    • http://sajatuvireguta.atwebpages.com/tagulowijagul.pdf
    • https://uploads.strikinglycdn.com/files/9cfe3b73-1e79-4d31-815a-54c3d5c4969f/nefolurarufurib.pdf
    • http://nabenejajoko.myartsonline.com/dillon_650_toolhead_stand.pdf
    • https://uploads.strikinglycdn.com/files/04c9d6ac-0dc6-42f3-af51-894dc18fcffb/allison_transmission_diagnostic_trouble_codes.pdf
    • https://uploads.strikinglycdn.com/files/9e2e1226-008a-45f3-8885-835987081f61/vufojoxaliso.pdf
    • https://uploads.strikinglycdn.com/files/0b09b770-0e71-4a43-b339-46b6b8f924d9/sub_zero_632_filter_replacement.pdf
    • https://uploads.strikinglycdn.com/files/520ec88c-95d8-446d-bcd9-41b317a1f0f4/bikevirazujule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f345.bin
254d781d44884b32fb5dfa5ceab0e8e427b2c698d62b869e0b8f76b84b5541d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 5184 bytes
font_01_sfnt_off000104c7.bin
adfbb57ab3456a69aad8722eae7509fee19ae467a68a4f0bce43d77ebf98cd96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 12256 bytes
font_02_sfnt_off00012b89.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 4324 bytes

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