Malicious PDF — malware analysis report

Static analysis result for SHA-256 63600928f4608cb2…

MALICIOUS

PDF

100.4 KB Created: 2021-03-20 07:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 618ad22d4d94ba897080f52434580de9 SHA-1: 5b92be2421c9a53ab5ca20842371a8e46345c100 SHA-256: 63600928f4608cb209e2b3def5acbf00b12576a4d85a728b03f96c7092ace609
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to a syllabus download, which is a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=upsc+assistant+commandant+syllabus+pdf+download
    • https://cdn.sqhk.co/noligigibar/cjiY2Up/m_d_f_sheet_design.pdf
    • https://cdn.sqhk.co/kusedesomawa/jeusjby/67777333200.pdf
    • https://cdn.sqhk.co/lomasamube/jigzl54/zugususakofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://negavutagogo.epizy.com/roomba_780_battery_reset.pdf
    • https://s3.amazonaws.com/xapijifas/free_3d_video_maker.pdf
    • https://uploads.strikinglycdn.com/files/26b327da-bb98-4bdc-88ce-74d093e3339a/92303931622.pdf
    • https://s3.amazonaws.com/gomakobez/bajikez.pdf
    • http://dekifovep.epizy.com/isometric_projection_basics.pdf
    • http://lagarudu.epizy.com/angular8_template_free.pdf
    • https://s3.amazonaws.com/zebarufuridorur/is_narnia_coming_to_netflix.pdf
    • https://s3.amazonaws.com/mixanaz/bosch_300_dryer_not_drying.pdf
    • https://uploads.strikinglycdn.com/files/af4ced7d-0837-4595-8a6d-f4d28303588e/weber_spirit_e-210_parts_list.pdf
    • https://uploads.strikinglycdn.com/files/cb89823d-2874-49d3-976d-ce06c31bf915/stihl_ts400_spark_plug_cover_removal.pdf
    • https://s3.amazonaws.com/tubukeganuji/blockade_3d_no_steam.pdf
    • https://uploads.strikinglycdn.com/files/c3012c4d-369d-4493-a311-86d0fff002e4/2015_ap_statistics_multiple_choice.pdf
    • http://bukuzagalu.rf.gd/melafikedasut.pdf
    • https://s3.amazonaws.com/wupixufekijax/charkha_mera_rangla_punjabi_song.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_off00012d55.bin
45b3ce598a29688dde3898298aef84943e2d2d7ef91b0f010d84900211bc222a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 5528 bytes
font_01_sfnt_off00014028.bin
91e12fd14feb77b79f5a8a6bbb96ca27bc0717d32ffd80acf88696f19372258c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14028 13780 bytes
font_02_sfnt_off00016d4e.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D4E 16060 bytes