Malicious PDF — malware analysis report

Static analysis result for SHA-256 e206ccf103f947e7…

MALICIOUS

PDF

86.9 KB Created: 2021-09-22 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 312b634ec47893a6059307222f3d3bb2 SHA-1: d453f97d1e6532d8d7f2ea32ada4e43a7713fa98 SHA-256: e206ccf103f947e735895e68215b1efe68942260f0d189010d9c3dcdaa62cc70
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to host or redirect to malicious content. The 'Callback Phishing' heuristic further suggests a lure to trick users into interacting with a malicious entity, likely via a phone call or by visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16149de79642ab---sebezewitinafulogepi.pdf In PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/7433284225efe9ea3ea3baf8190eee77/67705430281.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e332d068c8---zewidaliwufaw.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/53245471840.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/41170901084.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/17538613960.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///jemedibudidiw.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1613de31a4edbe---43346540754.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/junote.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/filadogugune.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/92115390065.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/sosonif.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/14128030698.pdfIn PDF document text
    • https://coevent.ru/upload/files/77022758774.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/68795250637.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/13440256884.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/74231101651.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/93383697889.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/zezuzur.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/direwakonurefenivaxitine.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/82032845914.pdfIn PDF document text
    • http://dlzj.net/upload/files/202109100518397272.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/3163742244.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fox+news+live+on+firestickPDF 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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 19224 bytes
SHA-256: ebee77c9b01eaf8ccda78741db3a621e3b9a3ede83cd1355ef028784841044b8
font_01_sfnt_off00011dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFE 10488 bytes
SHA-256: 02ad536b0324006559f3760b659e98832ef9994e920eef5687c5634beeb7febb
font_02_sfnt_off00013612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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