Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe6737a8fe9d3f9…

MALICIOUS

PDF

79.6 KB Created: 2021-03-28 16:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 89791315dd9d41aec465a1f63ff21662 SHA-1: 858c9d47e66942b7520af06193eac9c54f88c12b SHA-256: abe6737a8fe9d3f967f1b025bde9ae53af617d0bcc2550d73883741e528a7a58
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=5th+grade+spelling+bee+words+pdf PDF link annotation
    • http://nogezat.iblogger.org/kannada_movies_2019_full_movie_hd.pdfIn PDF document text
    • http://avbox.org/minecraft_pocket_edition_0.12_apk_download4vi5k.pdfIn PDF document text
    • http://bit7.top/21373893212x9hr9.pdfIn PDF document text
    • http://dopenukivo.22web.org/big_buddy_propane_heater_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_c450e14e07e845289277bc887d3be979.pdf?index=trueIn PDF document text
    • http://lozerur.rf.gd/basic_calculus_grade_11_learners_module_deped_tambayan.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/sebunadasosagutoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/10383201462.pdfIn PDF document text
    • http://tereralubo.epizy.com/how_to_set_the_time_on_a_capello_clock.pdfIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_a6518b7e4e0f4a0ba5bceacdecabfd92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/29451917221.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_9823cf0b6df44aa1bad10a1e33d705a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/century_120_volt_stick_welder.pdfIn PDF document text
    • http://tinijev.epizy.com/what_is_the_best_wireless_security_cameras_outdoor.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/40652797376.pdfIn PDF document text
    • http://waraposid.rf.gd/spiritual_meaning_of_the_number_607.pdfIn PDF document text
    • http://tejademadubo.rf.gd/anganwadi_form_2019_west_bengal.pdfIn PDF document text
    • http://zikefibuji.rf.gd/xitulanadudalevurab.pdfIn PDF document text
    • http://wegefidipa.epizy.com/quando_surgiu_horrio_de_vero_no_brasil.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/tazeluzabijutabijalezaxi.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_ff0d9d2126144a95aaa7c4b7bfa57275.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitozi/28485936350.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_321d803bbea54616814e6de931156415.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5352 bytes
SHA-256: 834787ed8309f4c0ec6bf7d00a9efd1c94215f3e6007a771721f5faeff7c754a
font_01_sfnt_off0000fbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE0 11272 bytes
SHA-256: 65a58457d44557620d26c8a49a05c678ba1a91ecc65c471385ffb71be3583cc8
font_02_sfnt_off00012130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12130 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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