Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56b2f60076b5222…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 20:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eb2b71f10813969673c0d080ed537518 SHA-1: c00b93a1d55d1e6cc49973b88b745b30838bcda7 SHA-256: f56b2f60076b522292b13cb471791d1d9f546cfe6a88ef0903738862787ac3ed
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URIs and the overall structure point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5839

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://nomylo.ru/uplcv?utm_term=how+do+i+update+my+android+tablet PDF link annotation
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e831696fbc---dagofepizamexib.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/92928415833.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/muxefo.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/manajupuniruratug.pdfIn PDF document text
    • http://freeski.hu/freeski/file/67944339594.pdfIn PDF document text
    • http://halmar.info/userfiles/file/88299589018.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109120822556603.pdfIn PDF document text
    • https://artenika.pl/fck/file/37840957715.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/57222584670.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/95209024516.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/zopedatugazilos.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109151257018603.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/vixalexusapa.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16138bfcdf1be1---wuxuxedimagej.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/33720152402.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346150bea65---suvotuzedovatavona.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/texifefisanasizud.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/1986617920.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137e26053fe7---menegelofixajuxusupadeda.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/98392053718.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/mudinawarugatexudesuko.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137a0d72ba9c---giwaje.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC5 10816 bytes
SHA-256: 8b9b66b05940b34bbb6c9f1839c475a158815369eec2acd94d6459817f18c30f

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