Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf7fb609fe04c66…

MALICIOUS

PDF

118.3 KB Created: 2021-02-16 19:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ddd662efb04ab791b723c557a7c33aac SHA-1: 3f982c131dc6c5805c0139c892a68ac8bd6d331b SHA-256: 9cf7fb609fe04c66c55b8378826b1de7f7dc7714920255570761de46e00372af
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://jacksth.ru/123?utm_term=what+does+flock+means+in+arabic PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445119/normal_60063fe2d1283.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413967/normal_6008b6699db17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408587/normal_5ffd2728e2c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428038/normal_600fba89baefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcfe4ca7c158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_6010a91060b42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_601b6cace4e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462037/normal_601e8d36b1c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_602af1b2e0326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_601fc49204d0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://nifimemewiz.epizy.com/call_of_duty_1._0_8_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/29092701249.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/giwovabijorelalefudezen.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/catholic_daily_bible_readings.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/slideshow_ae_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/deadlift_form_video_bodybuilding.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 5496 bytes
SHA-256: 3ad515cdc89568839c8c45feb247f7c47cc1507e6b977cd9812093eaab5f697b
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 5476 bytes
SHA-256: c63cfe6fdf16d4d062f20f887ad44ce83b0fa017bcde84d2b547f6b210c45791
font_02_sfnt_off00011e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9A 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off0001299c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299C 4524 bytes
SHA-256: 0290d03b58fefae54e9ed2de5f6b06e9d7ed5b94f5d72b00518317fcfc4e1de0
font_04_sfnt_off00013820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13820 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_05_sfnt_off000142d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D6 3560 bytes
SHA-256: 471730cdb6e43fe35b6d70cf9d490078184771c94762d7bc801f6ec978386ce3
font_06_sfnt_off00015096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15096 6620 bytes
SHA-256: 47f19c9b5edd2d4f90dc5d8f9ed1ec688bd27e26e26a0120b58fd4169853fdd5
font_07_sfnt_off00016222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16222 21560 bytes
SHA-256: db818e1b80987b221fcacb05da7d7bf285976bb6be3ccf2418233d5c2185b30f
font_08_sfnt_off00019db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DB7 18388 bytes
SHA-256: 34ab0169244b30b849b72479d3ef431a049f24fab4287e8ba14e7c70ace278fc
font_09_sfnt_off0001bafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAFA 2864 bytes
SHA-256: 7272a0aac5e93244213115f56ca7dbee52453d1817c4dbf01f0b81397108bcc5