Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54468996df17fcb…

MALICIOUS

PDF

123.4 KB Created: 2021-06-09 22:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba43a52522a7e42b61832bce99f33f68 SHA-1: 69156d48f1e3137332a8a299f9c6b0779fb6fd46 SHA-256: e54468996df17fcbdd048500205b5bedc44822db8473633ce338247896e5d073
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including an advance-fee scam lure and a high ML classifier score. The document body, though heavily obfuscated, appears to contain keywords related to counseling and PDF metadata indicating it was generated by wkhtmltopdf. The primary IOC is an external URL that likely hosts the malicious payload or leads to further stages of the attack. The presence of PDF_URI and EMBEDDED_URL heuristics suggests the document is designed to redirect the user to this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=open+ended+questions+in+counseling+pdf
    • https://cdn-cms.f-static.net/uploads/4453889/normal_606b0e95b9317.pdf
    • https://cdn-cms.f-static.net/uploads/4459483/normal_605f5b920166b.pdf
    • https://cdn-cms.f-static.net/uploads/4368958/normal_605d9539438cb.pdf
    • https://static.s123-cdn-static.com/uploads/4487432/normal_5fcd563d3f4b7.pdf
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5fe95498f321b.pdf
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fd9d5f5dbec2.pdf
    • https://cdn-cms.f-static.net/uploads/4368976/normal_606b4a5f56240.pdf
    • https://cdn-cms.f-static.net/uploads/4369908/normal_6044984255f19.pdf
    • https://cdn-cms.f-static.net/uploads/4367656/normal_605b00cf94eda.pdf
    • https://static.s123-cdn-static.com/uploads/4479902/normal_6002b7e447985.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dc62d063-4ab4-4724-a0b7-b19bd8f35f8e/56507780853.pdf
    • http://fawitugeva.pbworks.com/f/fishing_clash_codes_may_2021.pdf
    • http://razodegotit.pbworks.com/f/que_esperar_cuando_se_esta_esperando_libro.pdf
    • https://uploads.strikinglycdn.com/files/f3a609bd-6812-4f5a-a2a1-296fb8707a9e/59286830316.pdf
    • http://raxonepem.pbworks.com/f/how_to_open_bose_acoustimass_15_subwoofer.pdf
    • http://mupoxulo.pbworks.com/f/tomigetafojexopapuwuwuw.pdf
    • http://wexagiz.pbworks.com/w/file/fetch/144756570/14989255906.pdf
    • https://uploads.strikinglycdn.com/files/a4e60fb4-2b49-44f3-ae79-c14c38296338/bhagavad_gita_chapter_12_audio_chinmaya_mission.pdf
    • http://zanikofepaj.pbworks.com/w/file/fetch/144644463/what_page_do_kaz_and_inej_kiss.pdf
    • https://uploads.strikinglycdn.com/files/da4ed8fd-447d-41a4-bf56-503e0c7c3d25/descargar_guerra_mundial_z_2_pelicula_completa_en_espaol_latino.pdf
    • https://uploads.strikinglycdn.com/files/2ede4219-c181-45ce-a87f-47ecd14bffa5/79461097647.pdf
    • http://betifabito.pbworks.com/f/nalemiwegodutaf.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e51.bin
f43142ed75b4d1036d057c683a12db5b9a69831c68ebf8919e88b25c255e430e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E51 5172 bytes
font_01_sfnt_off0001a001.bin
2bdead100e3f10def51fcc2f1d1da66c3ac70fdc8ec9b7553ca86453eb9b6911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A001 12292 bytes
font_02_sfnt_off0001c9d6.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9D6 16204 bytes

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