Malicious PDF — malware analysis report

Static analysis result for SHA-256 353ffb5d987e9d7d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 06:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 15cd41953658e0a24cb87679d4a06c2c SHA-1: ad8bb0197e6712656f6bd980dc02c897a0200dde SHA-256: 353ffb5d987e9d7d4f8e3981f1149ed270c7c02011cdc47da6ab1b7deead6195
156 Risk Score

Malware Insights

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

The PDF contains numerous links to websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of multiple PDF link farm heuristics further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://marinapogon.pl/upload/file/69256661105.pdf In PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/4952402854.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/bapejaneduxovuni.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/73ghehj1qij7je5f0cl7860rd3/47650431735.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcb5757357---vituravoworadejurob.pdfIn PDF document text
    • https://p87.hu/files/96542233933.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/fujibixafegalisewefoju.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/napufenepo.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896f24c741d---jabozomum.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/kipogutulujir.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe6dca7523---naxubisovizopuwedezetobel.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160885ecb608f8---nixitokadal.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/bedixusivitozanonomaw.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dec13ef24a4---45462805541.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb55a33e4b---55925773882.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/tegixipafusikigifipamubag.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/polebomawasasanukaxavolo.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/43013587837.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/zozefegelolenerotelor.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/73698539562.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/9767707111.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/92017165034.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160877e57a198b---17417123496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=design+paper+drawingPDF 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_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 18032 bytes
SHA-256: 303c65052a391c2d2c2ad813ae616a744911598abffccdbb81e1d07bd8503b97
font_01_sfnt_off00011612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E29 10388 bytes
SHA-256: 0fd845b3d5279f41360bf2658adbced26a96efef693f198faaa2857e45b8d13e

Open this report in the interactive analyzer, or submit your own file for analysis.