Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cf0864e88e1813…

MALICIOUS

PDF

81.3 KB Created: 2021-09-14 07:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9ffd6aa5dcafede64177df326edb365 SHA-1: 6ac7787e9e9ccb36c994499023120232ce49f3fd SHA-256: 19cf0864e88e1813d1cc3c1a6fb29771f5bf9ead91fa03bb2e7bc0e23ebfc190
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised websites or are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://preiswerte-unterkunft-papenburg.de/mediapool/79512418727.pdf
    • http://i-physiology.ru/upload/debusidifesawedifol.pdf
    • http://delfosventures.net/userfiles/files/25677680755.pdf
    • https://aglogistics-bo.net/userfiles/file/91532819865.pdf
    • http://kiko168.com/UploadFile/file/20210905103552174.pdf
    • http://dailycan.com/userfiles/files/44027401626.pdf
    • http://denprokhorov.ru/images/file/39121013686.pdf
    • https://sssmri.com/ckfinder/userfiles/files/ratajerijen.pdf
    • http://thetestmag.com/userfiles/files/25690208178.pdf
    • https://fivetc.net/uploads/files/rojafuxakarenisi.pdf
    • http://ohappy.org/userData/board/file/27434264479.pdf
    • http://technology-mp.it/userfiles/files/bufufotetomewopa.pdf
    • http://ddaengshop.com/ckupload/files/87953453947.pdf
    • https://plentis.eu/ckfinder/userfiles/files/defitupezodetanaga.pdf
    • https://presstone.hu/userfiles/file/zenakutujose.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/aun1nbfhv72p2nnhvdopl2ocv1/nitivowusevuxapuditer.pdf
    • http://dreamsurgerycn.com/ckupload/files/80906625817.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16134b044afe72---66073250488.pdf
    • http://rc-modeller.se/images/file///simuxodurobokitavu.pdf
    • http://www.tsahimmongol.com/uploads/images/files/wepasuvoxepamusal.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ece996752f---84883773774.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=lord+of+the+rings+3+full+movie+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d7.bin
5e69be7247a843d4ed3b7f7cc8214bd1ed947a7720bfc07bd4fde7ba3d893394		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D7 10932 bytes
font_01_sfnt_off0000eecd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 16792 bytes
font_02_sfnt_off000106df.bin
9055e6c0055a76d12b19c236010ae331dee6a0a6a39ada111e32c596e97011cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 18892 bytes

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