Malicious PDF — malware analysis report

Static analysis result for SHA-256 17de2de9d625397c…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 05:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e070018c6efe864a04ed49e824f8bc42 SHA-1: 8862591c93b8189868272ee4c88af03c1837f9a9 SHA-256: 17de2de9d625397c48957245a0bd1795f3871afb2a1ad5584ec027636a608a19
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable domains. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://joesservicecenternj.com/userfiles/files/99383923065.pdf In PDF document text
    • http://gnatowski.pl/attachments/file/fokosapazufadowolowonelag.pdfIn PDF document text
    • http://usagimatur.com/files/others/73553718184.pdfIn PDF document text
    • https://palet-school.com/files/files/13337922398.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/dedopamataj.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/c879cff01ad4980f906939c21f9135ad/fexoloxeninadodimu.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/difenatisolowedarunutuba.pdfIn PDF document text
    • http://tfforming.ru/d/files/73344668112.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/febaxuwifu.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/tefawosome.pdfIn PDF document text
    • http://tomlitkom.ru/ckfinder/userfiles/files/lavozabot.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/2033678008.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/37629740934.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/37992322263.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/laguwiwogubox.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df06422249---xofukezabuvibu.pdfIn PDF document text
    • http://myphamasia.net/upload/files/saxubegapepu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5f88479e9---10318201521.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59888422589.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160758ceae9db8---xiribatewatagonapom.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/d5itpafmaiitptfhed0co909k8/gijituxiduvejor.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/90243731595.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/79223866396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=taariikhda+maxamed+siyaad+bare+pdfPDF 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_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 18608 bytes
SHA-256: 047b903c7a24de1fc75f6b5c9a6c46b51f4872edefedc5e169f842809449eb29
font_02_sfnt_off00011a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 10804 bytes
SHA-256: d732f8d4c106683ebcca209c4a299f78751fdf9b2625e3a07694d2164ee615cd

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