Malicious PDF — malware analysis report

Static analysis result for SHA-256 543dad881c3a7915…

MALICIOUS

PDF

70.2 KB Created: 2021-03-30 10:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ede560c3238371a59d6ca966300ce2b4 SHA-1: d2aa042ac44c6ced87e6c5ab3a28b56fdf069ad1 SHA-256: 543dad881c3a791528db738777249b5abbf4ad8fc5239308eeb206a045f19ad9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to a school, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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/wix?keyword=iola+roberts+elementary+school+pell+city+al
    • https://cdn.sqhk.co/wamamuli/w4Lhehg/la_novela_medicos_cast.pdf
    • https://cdn-cms.f-static.net/uploads/4410965/normal_603b242dd23ec.pdf
    • https://cdn.sqhk.co/furafurume/7OnozlP/mod_maker_for_minecraft_pe_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4476294/normal_604cfeafcddb4.pdf
    • https://cdn.sqhk.co/pabelewexo/chc2ibb/54736106992.pdf
    • https://cdn-cms.f-static.net/uploads/4465397/normal_604ebd44cb6f5.pdf
    • https://cdn.sqhk.co/vixemujomu/jehaPja/riridemoxadumikisi.pdf
    • https://cdn-cms.f-static.net/uploads/4473638/normal_606060ef848a2.pdf
    • http://sesaruzuvibi.22web.org/ninikerazopilikavi.pdf
    • https://cdn.sqhk.co/wejafivelij/FjjjdNL/vizimurob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2eabf74e-f916-4ef7-82af-dd96fbb4c10d/jinuworejabituzubopo.pdf
    • https://s3.amazonaws.com/mutirexa/29987714017.pdf
    • http://jajoxutevo.epizy.com/gamudibepasufi.pdf
    • https://s3.amazonaws.com/bokexizometun/xaxelujuxidopovuj.pdf
    • https://uploads.strikinglycdn.com/files/299a3397-51fe-4150-9d0c-60344f95b639/21806033776.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/9533341476.pdf
    • http://zixakopakopobel.epizy.com/97239690301.pdf
    • https://uploads.strikinglycdn.com/files/731ac349-8e82-4fcf-97cf-1475e2f8732d/kitchenaid_artisan_mixer_repair_manual.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/tomukexexonej.pdf
    • https://uploads.strikinglycdn.com/files/03efddd6-8bec-48ba-9245-2fb1ba772b10/vissani_mini_fridge_with_freezer_manual.pdf
    • https://uploads.strikinglycdn.com/files/64f15e30-085d-4fd0-bf2c-d05662cdf274/fusukupoxanus.pdf
    • https://s3.amazonaws.com/vapite/harrison_bergeron_study_questions_answers.pdf
    • https://uploads.strikinglycdn.com/files/220b67a4-9feb-469a-a3b8-129a79de0273/hp_laserjet_m1212nf_mfp_52.0_scanner_error.pdf
    • https://uploads.strikinglycdn.com/files/e0b52c00-f079-4fb7-a09a-37a5a191ae45/5713467691.pdf
    • https://uploads.strikinglycdn.com/files/65b4c235-57e8-42e5-841a-a31f035e3ee0/the_alienist_cast_season_3.pdf
    • http://suwojubomitela.epizy.com/korg_electribe_2bl.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_off0000d354.bin
e5578a9eca9ebfb4864d05bcf762d09f80b67970bc279a03b8ee098890095442		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 5352 bytes
font_01_sfnt_off0000e55e.bin
54ea40de54e7962c2c3f898075a18b6f7a013245bf77af685a58f5db0f710ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 10744 bytes

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