Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b19832b258f8e25…

MALICIOUS

PDF

72.0 KB Created: 2021-02-13 00:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cd836436df5bcadcd9e2cc0c82bf3f25 SHA-1: a572a570ce1daefcd198975f472a557915994a0c SHA-256: 0b19832b258f8e25d70611a0cafdb0a246b409f1316f7a10873f0c683e2eb9df
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/wix?keyword=brighton+donation+request PDF link annotation
    • http://barabew.iblogger.org/bluebeam_2017_trial.pdfIn PDF document text
    • http://kabuzajo.22web.org/tuzasalitowafa.pdfIn PDF document text
    • http://jimefat.22web.org/3715774650.pdfIn PDF document text
    • https://subamepowesita.weebly.com/uploads/1/3/4/8/134875458/gusixotabakopaw.pdfIn PDF document text
    • http://bijatutolime.iblogger.org/vokolebijofefasaboxagusu.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/tibog-gatoleronimo.pdfIn PDF document text
    • http://mukumalatixuji.iblogger.org/waktu_solat_pulau_pinang_2019.pdfIn PDF document text
    • http://xexevigaje.22web.org/vetomevota.pdfIn PDF document text
    • http://kirerela.iblogger.org/high_school_volleyball_score_sheet_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pageziwakuvagu.epizy.com/15537964227.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/administrao_estratgica_de_servios_gianesi.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/definition_of_worksheet_in_computer_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/immigration_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/bibexakakirezopexifan.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/arapahoe_high_school_athletic_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/cain_abel_v4_9._43_free.pdfIn PDF document text
    • http://kogosez.epizy.com/56846017577.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/22324603028.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/43638877151.pdfIn PDF document text
    • http://ninalosuza.rf.gd/bid_wars_mod_apk_2._8_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/46796872019.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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 5228 bytes
SHA-256: 87462c2c9c6d64506a240c14c7ab62493f679acad68bcb5451b10cb5cbd47852
font_01_sfnt_off0000ede4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 11028 bytes
SHA-256: 42e6121c03a30fb73a120701367f35a7eb68a1f47367b5138bda6772d5556a08

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