Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3dab6f6a54bf30…

MALICIOUS

PDF

92.7 KB Created: 2021-06-09 21:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a77f5c88ffb83e0ee156d0db83128e55 SHA-1: 01bc39008b4dc3805b5becfe84cb7697dfc014c5 SHA-256: fa3dab6f6a54bf3086d1f6cfc3e96c2bc476b311d2f94df01523e9cae8a36fc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to movie song downloads, which serves as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=cia+malayalam+movie+songs+download+mp3 PDF link annotation
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b5743896f---zilotuladot.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/34815150310.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/gobupixosawanuku.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d53c0ee15a---kumalazu.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e85e42548ff4acd12f93f76bbcf4688b/ruzozo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/uoacp8ljpcn90an24nmqa7u0p5/50299969080.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/52143957676.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/cedab7d5271be29da588282876fb62e3/75021359334.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8886e556---70259840342.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/c5dp11b9mabunmv15qjhal9o16/76473945001.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/b650e83e808715479ddf4f3ee91e89b2/gufijugowumim.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/vukem.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/8842846616.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1622612052.pdfIn PDF document text
    • https://aspirans.com/files/file/70621836856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DED 5508 bytes
SHA-256: 2d060c70eaa29ee61be73a49fffe1967b95f5b5e233a5f855a2fd2a936b39be3
font_01_sfnt_off000140bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BC 10996 bytes
SHA-256: 3bb8c87b9ca948a7ce63071f415495f4c7c5f00a1c24be289c0d2c49745fd65f

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