Malicious PDF — malware analysis report

Static analysis result for SHA-256 4655977de2f73ef9…

MALICIOUS

PDF

87.6 KB Created: 2021-03-13 15:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06ec7457ee3a33b8a7fc970093f14a7 SHA-1: bc90fedbdece7fb5da378dbb0cd87b83a75262d4 SHA-256: 4655977de2f73ef9348df13c2fdb1d16c683f5125c07c5f83c0c06afcfc20328
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=gloria+christmas+song+piano+sheet+music
    • https://cdn.sqhk.co/molodomo/jggidib/comics_unleashed_season_2_episode_7.pdf
    • https://cdn.sqhk.co/wuvexudid/iXEhejj/50597765032.pdf
    • https://cdn.sqhk.co/pixorikibam/jajcVyd/rapunzel_movie_2020.pdf
    • https://cdn.sqhk.co/xogodapap/cKshiic/spotify_sprint_retrospective.pdf
    • https://cdn.sqhk.co/gapalagabig/ageiKLv/tenotobip.pdf
    • https://cdn.sqhk.co/makafabakuna/7uhaghY/twisted_tea_calories.pdf
    • https://cdn.sqhk.co/kesokirow/DSGvidJ/ketchapp_basketball_mod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wusumuforibit.epizy.com/juegos_para_aprender_ingles_basico_online_gratis.pdf
    • https://s3.amazonaws.com/sinadi/steelhead_fishing_idaho_report.pdf
    • https://uploads.strikinglycdn.com/files/0ed87bda-4c3f-4ac0-a0b3-1620ba9a29c3/transformar_de_mm_a_pulgadas.pdf
    • https://s3.amazonaws.com/bulalowisu/christmas_background_hd_video.pdf
    • https://s3.amazonaws.com/zufojadibi/complete_blood_cell_count_report.pdf
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_5de09e4810084d0c9b15820c42761be9.pdf?index=true
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_c0fa24d3bd7f4aa8966e2fe09ff30a78.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f6801904-ada8-419e-9371-1e0cfc6d5267/norton_anthology_of_american_literature_shorter_8th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/836d57de-1c43-401f-8500-ebb60fb1fbad/sojumo.pdf
    • https://s3.amazonaws.com/redegelesibif/edc_canada_annual_report.pdf
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_5008b3e5277849728c950c6ae34281cb.pdf?index=true
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_2e15ae081aee4265bb695923050441d0.pdf?index=true
    • http://puwuvazesako.rf.gd/kambi_katha_malayalam_cartoon.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f578.bin
3beee5b2dcd20f8c880a02139938e1f4bd31091530ec6f2bd92c8b98a496cb11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 5260 bytes
font_01_sfnt_off0001072f.bin
018c6cd1072321d129bc292ef331db2077f8b57f5019a7b76296489d0e950ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 10356 bytes
font_02_sfnt_off00012ad7.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 16312 bytes
font_03_sfnt_off00014062.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14062 4324 bytes

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