Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe57d3c1c5ddc6b6…

MALICIOUS

PDF

72.4 KB Created: 2021-06-09 09:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b10423ff63af4458820b753b8a724d SHA-1: 9d0bbb8fc2b87320e1daa4d6b77947a706909e1a SHA-256: fe57d3c1c5ddc6b6654fc298ef93a3a40c08959d3c4653767454d54e19bc095b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. The embedded URL points to a domain that is likely hosting a malicious application download. The document body, though heavily obfuscated, contains text related to 'lyrically apk download without watermark', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/pbw?utm_term=lyrically+apk+download+without+watermark
    • https://cdn-cms.f-static.net/uploads/4381737/normal_6018e667ad23b.pdf
    • https://cdn-cms.f-static.net/uploads/4416494/normal_6042c12eb38c7.pdf
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fda6806dbf20.pdf
    • https://static.s123-cdn-static.com/uploads/4410695/normal_5fe3f3d796cb2.pdf
    • https://cdn-cms.f-static.net/uploads/4493245/normal_6020be3447f14.pdf
    • https://cdn-cms.f-static.net/uploads/4445749/normal_600d36052fadc.pdf
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5ffdc2ec9369a.pdf
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5fdf2d69e2313.pdf
    • https://cdn-cms.f-static.net/uploads/4502436/normal_602f15580db55.pdf
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fe0db75292f4.pdf
    • https://static.s123-cdn-static.com/uploads/4495059/normal_5ffa36812ea60.pdf
    • https://cdn-cms.f-static.net/uploads/4368985/normal_6052a6f411f26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a313cacf-c36f-40f2-b613-a591c1594f98/15320746867.pdf
    • https://uploads.strikinglycdn.com/files/fff7e559-f785-4d8c-8f2d-3e77c26b868b/mole_volume_conversion_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/c3aa5889-bed7-4ea7-ae92-6e3dd82286f1/26141484627.pdf
    • https://uploads.strikinglycdn.com/files/a2af5288-3134-4fa9-bc5e-6903a09998c8/hoover_windtunnel_3_pro_bagless_corded_upright_vacuum_uh70901pc.pdf
    • https://uploads.strikinglycdn.com/files/2ae45a8d-965d-4833-9768-abe4b03c8281/does_usps_provide_tracking.pdf
    • https://uploads.strikinglycdn.com/files/5eb7c4d7-c498-488b-8057-9a641d14e193/how_to_connect_plantronics_voyager_focus_uc_to_phone.pdf
    • https://uploads.strikinglycdn.com/files/6f7b3eb5-a42e-46d3-b04f-d03ec1f6906d/sansa_clip_mp3_player.pdf
    • http://sagidetubi.pbworks.com/w/file/fetch/144582825/diapositivas_power_point_metodologia_dela_investigacion.pdf
    • http://bezagodo.pbworks.com/f/tevinagusawenomenabudonu.pdf
    • http://dodosuta.pbworks.com/f/45986867106.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_off0000ddc9.bin
b8cf35e78824fdec4c491e688e0ffd99c4d3ee13d5bc252e8e7df3afa5a7d2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 5332 bytes
font_01_sfnt_off0000efe3.bin
de7a43cd772862267e71a747e020e0d8491af9725caec775ebd7dbfadcb8e8d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 10612 bytes

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