Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baea9489b3d89fc…

MALICIOUS

PDF

76.6 KB Created: 2021-05-23 11:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c0a8ecaafd67feb7b715e557424db2 SHA-1: a54fcc0c6e714967435fdb61570d1a4ed51f680f SHA-256: 1baea9489b3d89fc05a905468af4828b1db92876866213ed9c5dfe0fd60d7ba0
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that, when clicked, likely leads to the download of a second-stage payload. The document body, though heavily obfuscated, contains text related to movie songs and the authoring application, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=fatteshikast+marathi+movie+songs+free+download
    • https://cdn-cms.f-static.net/uploads/4414335/normal_5fdc606fbb118.pdf
    • https://cdn-cms.f-static.net/uploads/4462694/normal_6043987b8fe97.pdf
    • https://cdn-cms.f-static.net/uploads/4489237/normal_6017250f7636c.pdf
    • https://cdn-cms.f-static.net/uploads/4465007/normal_60659b03b2340.pdf
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fe348b375479.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/42362f74-dd20-49b4-97bc-ba9efbc07cdd/tefupenimiku.pdf
    • https://uploads.strikinglycdn.com/files/288b7697-1761-4a45-be73-01056488f748/zevokuba.pdf
    • https://uploads.strikinglycdn.com/files/7753e7ec-276c-48c9-821b-6293e203a341/clarity_xlc3.4_batteries.pdf
    • https://uploads.strikinglycdn.com/files/c60a801e-1304-4805-9f30-8037b0468df1/who_is_the_wealthiest_god.pdf
    • https://uploads.strikinglycdn.com/files/605309fe-b759-467d-b89b-c055b168e7a2/final_fantasy_xv_a_new_empire_resource_guide.pdf
    • https://uploads.strikinglycdn.com/files/df33788c-1e26-4eeb-a8b0-bbf0f7372b54/tidafoliribagurugiwa.pdf
    • https://uploads.strikinglycdn.com/files/03c940bf-6977-4241-a834-da3b15ee09d4/monster_illuminessence_starter_kit_walmart.pdf
    • https://s3.amazonaws.com/nazekisigiduz/mozefexitu.pdf
    • https://uploads.strikinglycdn.com/files/6e0ca6b6-dd51-4f6e-a8eb-aa0373dbb787/pdf_finger_labyrinth_printable.pdf
    • https://s3.amazonaws.com/lolijexejomak/91835885887.pdf
    • https://uploads.strikinglycdn.com/files/db955fa4-4fbd-4b00-9c24-ea4eda8364d3/5619199573.pdf
    • https://s3.amazonaws.com/gozifep/91143998361.pdf
    • https://uploads.strikinglycdn.com/files/a9c0c8e8-8f30-45a3-bfaf-3c9fbe708585/mapamundi_con_nombres_de_los_paises_en_grande_espaol.pdf
    • https://uploads.strikinglycdn.com/files/20424419-ec2c-420b-8ce9-95d768cb898b/xoxotanekusoluniposemi.pdf
    • https://uploads.strikinglycdn.com/files/72080a58-db26-441a-a4ac-3dd17e3c647a/how_to_add_sound_kits_to_fl_studio_mobile.pdf
    • https://uploads.strikinglycdn.com/files/b15e1829-84de-4a30-ba1f-0d569e306ea0/how_to_read_a_goodman_hvac_serial_number.pdf
    • https://uploads.strikinglycdn.com/files/b5fea021-0769-4c00-b16a-d099707b4c09/how_do_i_fix_e1_error_in_ifb_washing_machine.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_off0000ec84.bin
d6bbb499559dea8712944d5b55ab26fa19fa33ada9650e325e8c3d6f13e69602
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 5492 bytes
font_01_sfnt_off0000ff20.bin
de3ae4e74f6732cb15184b7d78c9862aa07907d05578bd98cbab9b917c3a1168
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 10972 bytes