Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2c99b72079b002…

MALICIOUS

PDF

73.0 KB Created: 2021-03-08 12:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8a58c72b48bd521815706bd68ff93577 SHA-1: aef6bd2557afaac94ac9befa3d3e2f8a58ddfdc6 SHA-256: ce2c99b72079b002fdcef4ada76afd538ce54dad87260f77b2bc65ae1e90235a
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://terulupi.weebly.com/uploads/1/3/1/4/131406892/3fda11ee.pdf.
  • 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://resalured.ru/award?keyword=inverse+of+4x4+matrix+example+pdf PDF link annotation
    • http://tameenegypt.com/cheesecake_dexter_gordon_sheet_musictxf5r.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/3fda11ee.pdfIn PDF document text
    • http://mujezixebu.22web.org/wazubukogifi.pdfIn PDF document text
    • http://gonzo-3d.com/what_do_you_do_when_your_iphone_screen_goes_black_and_wont_turn_on3m4vr.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/65f3c3b16b3e2.pdfIn PDF document text
    • http://esportzmlevent.com/olavo_de_carvalho_cofo9lh1.pdfIn PDF document text
    • http://uablog.website/97818515827ctck2.pdfIn PDF document text
    • http://wasumukidote.iblogger.org/what_is_culture_artifacts.pdfIn PDF document text
    • http://tazikuruwuwozu.22web.org/apache_rtr_180_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_601596013f6e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_601728f786ffd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_6007573f79057.pdfIn PDF document text
    • http://soldonlittleton.com/kavuvir1arw1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://derekage.epizy.com/australian_aboriginal_history.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/xatipetatan.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/7093196395.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/zesoxibenukatita.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/sekuxaj.pdfIn PDF document text
    • http://sezajurul.epizy.com/excel_2016_vba_activesheet._querytables._add.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/amman_devotional_songs_free_starmusiq.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_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 5340 bytes
SHA-256: b53ffddc8d5af6f142fc4dfa599829c703a89477b563b1db8b202968382d879f
font_01_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 10940 bytes
SHA-256: c1ff60eca549c257f05bdef8dc360b9b39c5b1e213f0956c3f6f20718e6f6bbd