Malicious PDF — malware analysis report

Static analysis result for SHA-256 20948c1554e22aee…

MALICIOUS

PDF

615.2 KB Created: 2025-11-10 09:37:42 -03:00 Authoring application: D4Sign.com.br (via mPDF 8.0.7) First seen: 2026-05-20
MD5: 48bf2918c469ab947b119330db29588c SHA-1: 400b3f1d8e5c408c439ae5150b599b03e1c9c3ad SHA-256: 20948c1554e22aee6c878ca773e25ab20632685bfde64b0e021b6cbe4c836da6
66 Risk Score

🔏 Digital signature Signed

A signature covers the whole signed byte range — PDF JavaScript is never signed on its own — and does not by itself mean the document is safe.

Machine Learning

  • Nyx PDF Classifier clean score 0.0002

Heuristics 4

  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://secure.d4sign.com.br/verificar In PDF document text
    • http://dejavu.sourceforge.netFontsIn extracted file (font_00_sfnt_off00002ae0.bin)
    • https://github.com/andre-fuchs/kerning-pairs/blob/master/LICENSE.mdIn extracted file (font_04_sfnt_off0007298e.bin)
    • https://www.google.com.br/maps/search/-23.5443807PDF link annotation
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In PDF document text
    • https://docs.microsoft.com/typography/abouthttp://lucasfonts.comMicrosoftIn extracted file (stream_038_off00078713.bin)
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (stream_038_off00078713.bin)
    • http://crl.microsoft.com/pki/crl/products/MicrosoftTimeStampPCA.crl0XIn extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0In extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/pkiops/crl/MicCodSigPCA2011_2011-07-08.crl0aIn extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/pkiops/certs/MicCodSigPCA2011_2011-07-08.crt0In extracted file (stream_038_off00078713.bin)
    • http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0TIn extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/pki/certs/MicrosoftRootCert.crt0In extracted file (stream_038_off00078713.bin)
    • http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl0^In extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/pki/certs/MicRooCerAut2011_2011_03_22.crt0��In extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/pkiops/docs/primarycps.htm0@In extracted file (stream_038_off00078713.bin)
    • http://www.microsoft.com/TypographyIn extracted file (stream_038_off00078713.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseDejaVuIn extracted file (font_00_sfnt_off00002ae0.bin)
    • https://docs.microsoft.com/typography/aboutWeightWidthRegularOpticalIn extracted file (font_04_sfnt_off0007298e.bin)
    • https://docs.microsoft.com/typography/aboutWeightWidthOpticalIn extracted file (font_05_sfnt_off00075424.bin)

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_038_off00078713.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x78713 125080 bytes
SHA-256: c3dd378dfbbe65472576865cd2fab3bb0aa830b23112fc8b959d8e8728666d44
stream_040_off00084096.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x84096 109344 bytes
SHA-256: 1a7539f08f39c6f980c711fd288ad0d61c8f7d6e54f7b287f327ddfe44b5cc34
font_00_sfnt_off00002ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE0 26864 bytes
SHA-256: bb1902bdab9e1f842c6af42556403a6915e9e9c0db8025b2776227de64fa04a5
font_01_sfnt_off0000638c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638C 27604 bytes
SHA-256: c1c775f0b54973a64fc8d3ea692b07c800f889183e98ef8802c05d64e8d1b6af
font_02_sfnt_off00064ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA8 62168 bytes
SHA-256: c09a2e6343119ce2566925c49ece260951d0a1f1441cc5cbefaf105fe9a6539f
font_03_sfnt_off00069574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69574 93316 bytes
SHA-256: 5d077ec8ddd5efe5990b369c32958a26e152e207eb2a323092dabe24e7eb0610
font_04_sfnt_off0007298e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7298E 23808 bytes
SHA-256: 059d07f458f68eeac0b1484b10f326d5086329b6272888b890b360e322edee45
font_05_sfnt_off00075424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75424 23632 bytes
SHA-256: 8af3cb501d5e69e8ecc4e2b8f0f44a50c5ee69c8b036fbe224d6fb5b5a3d4ff0
font_08_sfnt_off0009097c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9097C 38104 bytes
SHA-256: 18d118556161a7a7afc98295446cf0418a13f6ede2166ebff50705c41beafc81
font_09_sfnt_off0009295e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9295E 20092 bytes
SHA-256: 02e78377e4ca2b30ab546944f70d2c2f0e1ae463920c250e42e979fbc8575ac2