Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5e7ac1a65e7356…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 17:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3a1c1b245ab4c9992741ea5b0a5a8ac9 SHA-1: 6395bfa6ff8f13d8cc1711134e2ce7585614d9da SHA-256: 5b5e7ac1a65e73563063cff01d31ea49dd59eebaedfe552fdcaeef12add7a72a
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://druttle.ru/wb?keyword=how%20to%20get%20gerudo%20shield%20in%20gerudo%20town PDF link annotation
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/sufipimixoxin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5fd2512633246.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/kulunisonipal.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/lySgiFb/67165344976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5fcc61b81745d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5fdc72041a044.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/palikuvexake/android_asset_studio_9_patch.pdfIn PDF document text
    • http://bumumewevebav.epizy.com/binge_eating_disorder.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/wrong_turn_4_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/natuw.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/certificat_de_cession_de_vhicule_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/joey_graceffa_book_in_real_life.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/41279478670.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/crayfish_external_anatomy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/bixidixuwikovodamo.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_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 4928 bytes
SHA-256: b1c2e42c9bb767bcdee0aa223ac4220784bd8f35d53f776dc303eaf9cd06cebe
font_01_sfnt_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 10732 bytes
SHA-256: ed3133aafbaf0da593a5d3b7cff897f408e0ad5b5b0a3f6a0967de0b11628927