Malicious PDF — malware analysis report

Static analysis result for SHA-256 995e674d7e062b8f…

MALICIOUS

PDF

49.0 KB Created: 2020-10-07 19:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 986b26fecac1449799ef6bd83f0e20b2 SHA-1: e9184ec656c68bd64120d789da9fb8953cb227c3 SHA-256: 995e674d7e062b8fe3ea9c0e1815a85d242e4d30f6abc8ae6a102137001ecc65
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.club/pify?keyword=zelda+no+densetsu+kamigami+no+triforce+v1.0+rom+with+an+.smc+or+.sfc+extension In PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/lezitugupize.pdfIn PDF document text
    • https://site-1039785.mozfiles.com/files/1039785/52881923622.pdfIn PDF document text
    • https://site-1039676.mozfiles.com/files/1039676/lojutarutufizuwoxipezib.pdfIn PDF document text
    • http://files.lukaswolfacupuncture.com/uploads/1/3/1/4/131406442/3215015.pdfIn PDF document text
    • http://waguwa.malikeusoff.com/uploads/1/3/1/3/131398064/83abc9.pdfIn PDF document text
    • http://files.fineartbyraven.com/uploads/1/3/1/3/131383604/maviraxitoguta_derifekekola_murerudebebupod_posotunabokew.pdfIn PDF document text
    • http://jijosu.essentialfocuscoaching.com/uploads/1/3/1/6/131637284/tuxate_wuvavelirevu_disolefuzagosi_pojivegovagubur.pdfIn PDF document text
    • http://tejur.championshipvision.org/uploads/1/3/0/8/130874683/gifekila.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6666/6389/files/megapududijaxelurelu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 4836 bytes
SHA-256: 642ef8504f531d20ca34d3e8decbf2f51d6492e0a67445799991984be1047f96
font_01_sfnt_off00007242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 5900 bytes
SHA-256: ece8733ada98f05ccc42297e98927c852ac730269a33089a0bd847925c45e146
font_02_sfnt_off0000865b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865B 15608 bytes
SHA-256: 6f72739f14f1641eb9c5660a24c241a2f9989214fa7382c3495849cff043d185