Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbeb47ad671ac4e…

MALICIOUS

PDF

67.1 KB Created: 2021-03-22 15:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fabb7c3aeb4ec310a44700ee3d1bf01f SHA-1: 119cb3db6befca277713b636a263ef2845a9de19 SHA-256: 5dbeb47ad671ac4efed034bfb9b434aba80405b2539cf55c23a2580ef2b0f369
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=chapter+17+chemical+texture+services+test+answers PDF link annotation
    • http://1xbet-regi.site/nintendo_3ds_legend_of_zelda_twilight_princesshpm5b.pdfIn PDF document text
    • http://fringigejy.site/message_to_the_black_man_quotes72axz.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/RgiGgds/doom_patrol_cast_rita.pdfIn PDF document text
    • http://9gusevshop.website/54360026619h8hqj.pdfIn PDF document text
    • http://ooovseanalizi.ru/shingeki_no_kyojin_season_3_part_2_opening_song_downloada9xfs.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/h79BggS/kolosixufobupikejezinitiz.pdfIn PDF document text
    • http://summ-green.fun/antibiotics_classification_based_on_spectrumaezua.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/eAjfU3L/77701326562.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/fcYMbwE/51775895210.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/sHieGie/strikeforce_kitty_last_stand_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/LgdkjaD/perafomadonop.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/hh9jfjf/48476837135.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/jiigeXk/gupanojowomojezagiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/hihtjiM/25871384237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resisuna/dufejixibojobeze.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/why_are_my_beats_solo_3_not_turning_on.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_bded95fc465c443db2d997eb2c54a1ff.pdf?index=trueIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_310b0aebd86045c4bf99995bff5526dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/44786051148.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/jadidowifegav.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/the_abyss_1989_full_movie_in_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/gradle_clean_test_jacocotestreport.pdfIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_d46463f066ac49a3bd49ad3530a8dea9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawuvud/tremble_for_my_beloved_song.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2B 5432 bytes
SHA-256: 4d755cdbaaacc0ed3c5d85fc0033a48857989308a34b1207185f65fab6686ef9
font_01_sfnt_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 9764 bytes
SHA-256: c2e43ce1d0aaf4840530109df2b8dbbaa1bf907b50e75cc6c6c26d92cf0bea20

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