Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69d1ec68ae2c02d…

MALICIOUS

PDF

73.5 KB Created: 2021-09-30 15:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3470a221a6981063d7364698e666a4cf SHA-1: 107c0b423f8030e8066b52ee04f152cee5eb85d2 SHA-256: d69d1ec68ae2c02d89f74203bd2e12f4533ab3a857f6d182efcde29a8b0f6477
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.ags-sib.ru/ckfinder/userfiles/files/80326482637.pdf In PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/25843104492.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/28022748628.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/moxaziwozexunuronemil.pdfIn PDF document text
    • http://maksimetall.ru/files/44599106957.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16152ea5b3fd17---wivuxogas.pdfIn PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/92760951688.pdfIn PDF document text
    • http://rld-carbon.ru/file/nitelidizi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/02b1a68ee670a1966c2a597ba787540b/73698932542.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/55915344733.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/32842748745.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/15929643160.pdfIn PDF document text
    • https://clubon.top/uploads/files/tirulirijigumedazotur.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/47869377676.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/26146741367.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/16795365585.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/39866442436.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5169438932.pdfIn PDF document text
    • https://securitydm.net/slicice/file/2869684273.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/jolidupadanu.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/50613450192.pdfIn PDF document text
    • https://hojoairport.com/images/file/45641894805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=love+action+drama+full+movie+watch+online+with+english+subtitlesPDF 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_off0000b549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB549 18108 bytes
SHA-256: d69a12c30f80bf863eed26de1daa4528b296f4b77f702fb692605ea5afdd6201
font_01_sfnt_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 11272 bytes
SHA-256: 4b91e1405fd4a8e58008dfcf5c07413dc32581f4715b90d0da562e460c6791f0
font_02_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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