Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfbcd84d3e2732a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 09:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 12c57139c4d3a6e5924ef772b9ca1947 SHA-1: fd4ca99a83c27bcc62d5e66e3fb0825376a125a8 SHA-256: 1dfbcd84d3e2732a88ff26a4fe35ea8fd33cacecd26a33b72195f9b51692b6d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://radio-salsa.fr/php/rs/filesupload/file/tetilaronaf.pdf In PDF document text
    • https://cobrawire.com/userfiles/files/65777094316.pdfIn PDF document text
    • https://sapporopools.com/contents/files/toxapinewadigonunewuva.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/10024309245.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/23211304619.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/74570523011.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/tiwadufanilapusogatep.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/jinalesusinenepupigo.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/36862168064.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/87287814996.pdfIn PDF document text
    • http://mega.kz/media/upload/files/puzavufanedekozizasidofe.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/41071509166.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/nopizupewodexamajewavozal.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/zirojikivufulifazebapare.pdfIn PDF document text
    • https://bursac.net/userfiles/file/vumorakutozukuvosuwapap.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/pibapekusidov.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/gelagunemuwukemidegifulug.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/dufatiwoxowadetulimiv.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/55223273924.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/remibixegofisezok.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/32075226735.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/20664727632.pdfIn PDF document text
    • http://synhbio.com/upload/files/11205532938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=block+this+latest+apkPDF link annotation
    • 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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 10412 bytes
SHA-256: 7e1d549ec381db0dcc0acf611e09a099133cd0844ef2c4a7a86c1ce40039d89d
font_02_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 18096 bytes
SHA-256: 15f498700abc9bdf21c882bc39afc17e75889119d788fb198337ba1d59fc486a

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