Malicious PDF — malware analysis report

Static analysis result for SHA-256 1668f3bc9eacd454…

MALICIOUS

PDF

77.1 KB Created: 2021-02-18 20:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d7cf7ea82198361db695c4104c6a8529 SHA-1: 664449e5b434e44779575f28b0ccf70bea158b89 SHA-256: 1668f3bc9eacd454c7d14fe7c096b60b5125e68324874bb7bc4c7a79fc7b93d9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=2018+lexus+gx+460+sport+package+for+sale PDF link annotation
    • https://bowixasexagat.weebly.com/uploads/1/3/4/0/134041419/e512e07.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/c56b8c44.pdfIn PDF document text
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/11e168.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/2811787.pdfIn PDF document text
    • http://kyrgyztours.com/ischemia_necrosis_informationw6pdd.pdfIn PDF document text
    • https://pesakezered.weebly.com/uploads/1/3/4/7/134729162/denufidanomagozex.pdfIn PDF document text
    • https://jigudubexafodi.weebly.com/uploads/1/3/0/7/130738940/totisaberagabozeveb.pdfIn PDF document text
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/kutogafidedu.pdfIn PDF document text
    • http://firstdoctor.xyz/network_study_guide_free_downloadk7m3a.pdfIn PDF document text
    • http://heleogose.online/background_blue_pic5q6eq.pdfIn PDF document text
    • https://farurepakal.weebly.com/uploads/1/3/5/3/135318469/kiwepimibolixo-tolufupedag-mebama-jolagawomudeba.pdfIn PDF document text
    • https://nugubigu.weebly.com/uploads/1/3/5/3/135323865/986166.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/moduluzuxikari/extent_reports_selenium_c.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/mebamiwafuxuve.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/tipebarodoporavabok.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/easy_boogie_woogie_piano_free_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/bbc_iplayer_failed_media_selector.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/dinuwijupitutuwa.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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 5980 bytes
SHA-256: 55143b99f2e6372414715ba4e0101b630885a939bbc22e44a49632a56fddab56
font_01_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 13272 bytes
SHA-256: bf3ac1174d1c3b282d8f12c67a9b83ce34a9a8c8ea8183123caee6ae2e155c8e

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