Malicious PDF — malware analysis report

Static analysis result for SHA-256 1870ef76481411ed…

MALICIOUS

PDF

53.2 KB Created: 2020-11-08 14:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c0946753d8b37c586a4d45ccd2c77103 SHA-1: cfb1e236d457be971757435f5caa201129b387ef SHA-256: 1870ef76481411ed2e8e5ff540974e4d4b1fbd3e8c6a0f2afdb37bdc8e3857fe
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/f22a81f.pdf.
  • 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://traffset.ru/aws?keyword=badoo+premium+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f88c1a2c75bb.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/f22a81f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5f98b08fcb122.pdfIn PDF document text
    • https://komakuzafoge.weebly.com/uploads/1/3/4/5/134576335/7079830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5fa78390de8b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tudazanesemi.files.wordpress.com/2020/11/47844078260.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/2440490820.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/96744859806.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/godego.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/bartkira_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/castle_clash_cheats.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D27 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00006d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 5008 bytes
SHA-256: cc6d27330229d6e0de56526a60795193580228ecd01ac599f71e904db3dc625d
font_02_sfnt_off00007e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0A 3584 bytes
SHA-256: 069da5ec3abaade5d1073bd01fe6df1a3e02035b7488b6a2927a593543616004
font_03_sfnt_off00008c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C47 10600 bytes
SHA-256: 5dc658ade5fc140bc66351efc05d525f0f49da514bc9815e1432e5506b9b1655
font_04_sfnt_off0000b0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B8 16504 bytes
SHA-256: 89c4e6f4d9664fbd621897cc1e92e7726fec29a324beeb7a4197236a5d1145db