Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aeb803195a92d84…

MALICIOUS

PDF

76.0 KB Created: 2021-06-28 20:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f6e2e22d1feb65047c7b952f3fc2d0ca SHA-1: 173561243c59160ea8f591f3037621dd7b7688a6 SHA-256: 1aeb803195a92d84948022e808cd6b3a13601d10fdf808f5e22d371be1b2746a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The document body is unreadable, but the heuristics and numerous extracted URLs strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/86b608e690a18064eb0b11ef78209e9f/4518162298.pdf In PDF document text
    • http://jhferry.com/data/fckeditor/file///soluriragosemareriseg.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1a968fe1f---39221546254.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6s1qbe3g3dj3kneskfr15hu5u8/visatuloloje.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/mitewumidekujogowijoli.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/77895618523.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/misebeb.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdbdfba5bc---lusopopulopagabixolam.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/fijilifu.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3888eefb13b22af3ccce43fbd37f1731/xumepuzezorilopo.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/3bc52c4c6e947bcd4806a17b41f7d56a/mukiwovitub.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d126e18e19---14862945157.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/7prbmaptiebcfhja9d16dllk34/77333517930.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076233a672d3---nivenasinudag.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/4td9chl4lcin2hcsths4i7fvlc/seresalawozes.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a6836314d5a---sadupedaxapobonugitavajo.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/6558edc752c006d2003923c233cef4dc/wutosobolojupewerenodafo.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c3030bea3e1a8ae129d2499ae87714db/vobajubodedefe.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78088008448.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/e454b94d50805360348eae4afcf56adc/rigazazipakuvapufewaw.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/50857680271.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062109015280.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/5476171546.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1ac5642a4---27253987922.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee2c022204---muguxobolawog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=my+life+has+never+been+a+bed+of+rosesPDF 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_off0000c796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 10664 bytes
SHA-256: 72742afe6b2358f46d33df43c50622c147ed3a8fcae47ba9f0077383285f240e
font_01_sfnt_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 16808 bytes
SHA-256: 9ba370822b5c0b759a4ebfc6ff751f4348e6a2d90d39dfe67c670e08b728b31a
font_02_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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