Malicious PDF — malware analysis report

Static analysis result for SHA-256 292ee38d2fccb5c2…

MALICIOUS

PDF

73.3 KB Created: 2021-09-16 14:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ca262aed6a502e9881431ce12349e368 SHA-1: 3ff17de1e55443fbba058b3ddec84cbf4979e238 SHA-256: 292ee38d2fccb5c2e0dd50eb48a08e4e1aa3e4c648cf9bfc17296721c4fd3a03
196 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command-line execution tokens within the document text, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 https://allytemp.ru/uplcv?utm_term=mobdro+like+apps+for+firestick PDF link annotation
    • http://camelliafb.com/uploads/files/202109011723361444.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/58746958782.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/wuwevav.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0a324c29---85492830897.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/xisibosijebokeko.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/78873080015.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/98875198048.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/suxojuwoferetezaraf.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/71887061236.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/tizuwazuvodazadojosuduni.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/nodobowixawujiro.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/3751047151.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/35849226220.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3564530f1---61789082702.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/98595087822.pdfIn PDF document text
    • http://qdcmd.com/data/files/sumomejededogenu.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/8l1crt6t2nald18hllcc88pius/lemixijatobuluwodigum.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/piranatojerorolorewugete.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/64724570656.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-5/20210905141953710153.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/32307295949.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/retajatulirivuz.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/bexewofutanixitiz.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/87145051705.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/moxorezaxaparoworafilije.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/98234596705.pdfIn PDF document text
    • https://gtsonline.nlIn macro / runtime command snippet
    • 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_off0000bc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD422 16636 bytes
SHA-256: 6d8f4f1326792f2268c75104c552cd04d7b4919a364b5db5af35e21ad04fdc68
font_02_sfnt_off0000ff4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 10732 bytes
SHA-256: 7e32c2b8dea23fdc2161be85d18b455b32aa625adf95ca96ee1b0c2a6c0d23b1

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