Malicious PDF — malware analysis report

Static analysis result for SHA-256 955f7648de3bcd8e…

MALICIOUS

PDF

72.1 KB Created: 2021-09-21 10:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ffcd0d3532b6506a787a420e4db8e50c SHA-1: fa8baed92910b382fe69a3ac5ee41c9a57b9d763 SHA-256: 955f7648de3bcd8ed0dfee47562c2f36b96a84f02b85c4c3a92a0bfdc400a0f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute phishing or malware. The presence of external URI heuristics and link farm indicators strongly suggests the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6891

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://inwebjor.ru/uplcv?utm_term=pet+shop+mod+apk PDF link annotation
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161363e4fc9f94---50280657709.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/movujixanafurekamivuwipil.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/60938978294.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210907_073142.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6ad2128fe---27481377477.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/99181849454.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/fediluzodugej.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/javiwinepurinolagusonopu.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/ruwizuluzajafiz.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/75252402120.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f153bdde9ee73587a0a902286d1875c7/27272764825.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/9634472640.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f152f2ccb4---kalosozibur.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/bunotazapefep.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/42577037392.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_off0000d7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 10408 bytes
SHA-256: 952bb242e3db19d1c63b7c53b5b341ba69a309956a4081b674009d7eab2ba573
font_01_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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