Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f1358329a5f792…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 12:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9aaab4d5b175c834017beb27d14090fb SHA-1: 254731deb1cdc57d7b35f1f9af00d158544b4dc3 SHA-256: d5f1358329a5f7927366d55079e6cf1e6f09d6df4433346e1f97855a98172132
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=what+is+smart+iptv PDF link annotation
    • http://softwaretesting.kr/club/data/userfiles/file/20210908162938.pdfIn PDF document text
    • https://ratodua.com/contents/files/gokope.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/16013742459.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/zunazabalikowoxuje.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/xuxedizinire.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/jelabobojaremewupok.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/lejin.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/77482394133.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/mirulaketaxiwufubobilo.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/mutajakekufalomuf.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/mirum.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/19147909730.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142114fe1799---kezadapukuf.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/25817052607.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/39664356954.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/bokabajiso.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2d88ea0c3---13735950949.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/79583582085.pdfIn PDF document text
    • https://rwd.webseo.tw/upload/files/fexuwujuremukavonaj.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/12818284049.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/xufif.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/44920713664.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/49727036412.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/60231949826.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 10176 bytes
SHA-256: 0a9d25491922c5fd61656efc42698bb39cbdc191391f76147d0943e7e3bcf260
font_01_sfnt_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 17436 bytes
SHA-256: 114b178940eea847c6fc384c08079ef413996ec277dfa750425927fa8b8da26e

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