Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c19571e3d4727c1…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 00:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fbd4435486193f073b07034abbb42885 SHA-1: 4f2346ad4182b417bd291e6abb013924d5557ea9 SHA-256: 7c19571e3d4727c12c5403ba3936de6d3e03c4b4234b322850b08797004f7d68
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=melnor+oscillating+sprinkler+with+timer PDF link annotation
    • http://leseweremizew.scienceontheweb.net/the_beginning_of_everything_film.pdfIn PDF document text
    • https://kabugumaka.weebly.com/uploads/1/3/6/0/136099465/xijijuzitijepamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5fd3474f94d78.pdfIn PDF document text
    • https://betuvumog.weebly.com/uploads/1/3/1/1/131163564/9750728.pdfIn PDF document text
    • https://zexebige.weebly.com/uploads/1/3/0/8/130813378/malamemeruliwavigaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427076/normal_6003a3cad09c1.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/timeziso/24560814016.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/73555344435.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/the_neverending_story_book_chapter_summary.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/gatumanewon.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/bangla_application_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/kubepigevoxuwoxoxemikes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/unprotect_sheet_excel_2010_forgot_password.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/australian_dietary_guidelines_during_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/11996154531.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/caa_thomas_cook_atol_claim_form.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_off0000e233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE233 5508 bytes
SHA-256: 9635b8c9b6b4c25e7241812e6cfd0527684a9650605df4f968c19a8779574164
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 10080 bytes
SHA-256: fda1b2fd5b356a64e2a99acc9906c62c58554ee54def53ff75a714310edc691e

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