Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c2822af298e92f…

MALICIOUS

PDF

73.4 KB Created: 2021-04-08 00:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77cf2105706cf295b6d2c2fdf0c519a1 SHA-1: d30cb1e8954640bf7d5eb2d0ba371e4edd0c1cf4 SHA-256: b4c2822af298e92f557898e0b4aa4309fcd716f525595d7f96993125a923cd9a
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. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user trust by masquerading as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=graduation+ceremony+program+template+sample
    • https://cdn.sqhk.co/kotafuli/jjEGjdj/yellowstone_season_2_episode_8.pdf
    • https://cdn.sqhk.co/badexejos/ibjjgjc/choir_music_sheet.pdf
    • https://cdn.sqhk.co/lajoroteb/id3hgjc/mugogopakuwu.pdf
    • https://cdn.sqhk.co/fedelubu/jujefyI/super_world_of_teddy_bears.pdf
    • https://cdn.sqhk.co/dutebevon/gnahaig/ara_pacis_storia_dell_arte.pdf
    • https://cdn.sqhk.co/nasanoroge/bggCAgc/billboard_pic_frames_download.pdf
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdf
    • https://cdn.sqhk.co/muwitajo/ztNhcqW/transmission_fluid_check.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0fb5f4aa-4082-4b0f-93e2-124edb3cc511/using_samsung_hmx-f90_as_webcam.pdf
    • https://uploads.strikinglycdn.com/files/abc41593-50a2-46b4-96ef-583fd5e3913b/how_long_does_it_take_jlab_wireless_earbuds_to_charge.pdf
    • https://uploads.strikinglycdn.com/files/732c5cff-e6a7-4efd-87fc-b938de3605e5/titus_andronicus_summary_sparknotes.pdf
    • https://uploads.strikinglycdn.com/files/66f52662-fe9a-41c2-86c5-385936a32d8e/in_a_dark_dark_wood_movie_cast.pdf
    • https://uploads.strikinglycdn.com/files/782efb41-b738-4b49-97fb-fd82da46acef/how_much_does_a_skyjack_sjiii_3219_weight.pdf
    • https://uploads.strikinglycdn.com/files/bfcbe93b-adbc-490e-bd7d-f20821521b4e/how_does_energizer_battery_charger_work.pdf
    • https://uploads.strikinglycdn.com/files/da8c1bd4-690b-4653-80d5-46c903d87cf5/melotogiloluvirurutewe.pdf
    • https://uploads.strikinglycdn.com/files/badaecbf-6f58-4eca-a783-1c823cd4e7f6/air-lap1142n-a-k9_setup_guide.pdf
    • https://uploads.strikinglycdn.com/files/3528b88c-bfc2-4331-8265-fe9ae2eb89c6/dufubijefelinuxiva.pdf
    • https://uploads.strikinglycdn.com/files/efe121ae-904c-46fd-a8e3-f38878787efb/aprendizajes_clave_primer_grado_primaria_espaol.pdf
    • https://uploads.strikinglycdn.com/files/e7859dcd-75cb-46c3-a417-94d6d22198f8/santo_rosario_catolico_con_letanias.pdf
    • https://uploads.strikinglycdn.com/files/c631767c-3806-4418-8730-b95735c7268d/the_divine_comedy_free_download.pdf
    • https://uploads.strikinglycdn.com/files/e56cf226-bb05-4aa0-a030-847313abee3b/36723148773.pdf
    • https://uploads.strikinglycdn.com/files/6761a5da-1fae-47fd-8b44-2d0db6c8b83f/2685090248.pdf
    • https://uploads.strikinglycdn.com/files/8a0c6e9e-05bc-4177-9166-811647374fbf/fokimowomiziza.pdf
    • https://uploads.strikinglycdn.com/files/b151b368-d8c0-434a-af35-faf32f2fc39a/42364767354.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_off0000e20c.bin
5b778b8cc2c45ff1c85422f1bacfa7b5ebb836331c3890c342e7527a1333e93a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 5528 bytes
font_01_sfnt_off0000f4cc.bin
1f167ddacd73b29575d256e5e4c3d6a69094d5491c519e9137ba530d282d0acc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 10340 bytes