Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17f1199660451e7…

MALICIOUS

PDF

84.4 KB Created: 2021-09-19 05:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2aa09bfbe6a3602a5cbdb5e6edf32c39 SHA-1: a1487476756d94673fef7db3870431f2cac282f0 SHA-256: d17f1199660451e7fc2c490eaec587d6c12be23aa49239ed9ca165fdfcc5ef8a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to potentially compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=aladdin+full+movie+download+free PDF link annotation
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/91386025863.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/04e30faebd1792a8e382552de8fc0b1c/5777584313.pdfIn PDF document text
    • http://unsersohn.com/images/file/luxodomilavoxudupeviro.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/3213142321.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/bowumuxutolutilali.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///bobutimesatogazuloxuso.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/79762291053.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/pupekolar.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/baxufilipinateju.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/daxovor.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210906_79735C5C8F7429F4.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142fb9c01b05---35082777000.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/remimolavep.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/47740242320.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/52655931461.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6e0b4181393a7baac98c29764e26bfc2/963271156.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/60625533316.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/0ddfqom9r75gs0d3tal23sbrfu/54098211356.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/41308135609.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/96740093798.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/39668189277.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/kusizapunabudelerateki.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/92419314428.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b77b08d04b---18337278932.pdfIn PDF document text
    • 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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 10484 bytes
SHA-256: 651c6b6bb5bbeac8b9529f575f8011e24f979d5640584a0f3245cfcd33364877
font_02_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 17292 bytes
SHA-256: 31dda1428afdc9701771a4ada115e6a1e8980aa1af7948c580bc10f633702b4d