Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0ce7997320f9da…

MALICIOUS

PDF

92.6 KB Created: 2021-09-05 13:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49f0edf55b941dc1a5afb90d53af3b9d SHA-1: 7e88a6d3513f1d65bb9501e1e39f83a8512d60df SHA-256: 6c0ce7997320f9dabb0727c09e5ba24e64604e881d3a78c22c32bbef94ca92bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://wastran.ru/uplcv?utm_term=different+yoga+poses+and+their+benefits+pdf PDF link annotation
    • http://esrafisek.com/images_upload/files/ralaxej.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/mixeku.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/klb1o679c3ulkt06s19b61ca7t/43433036177.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e397559c7f---81011100697.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/gadutud.pdfIn PDF document text
    • http://langmypham.com/luutru/files/74582342996.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/61928797106.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/15819073965.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/71890992313.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/f942bce28d12df42e58702853b1a8856/pupuxopujomojeborasamaxom.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/24146514095.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607355b55a82a---48616326103.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b65140003c---jifit.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/podelel.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/7900248343.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/36792630614.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/2ce52c2c0eb9e64e587fa91d310a6cc6/widixadove.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/wuxuwerawukavixuperapij.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/k3ulj8bj2jn2ciep4up1nfqcfc/35890197606.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/vakut.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/57948799785.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/55464772373.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7fccb5f78---63551304572.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_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 10988 bytes
SHA-256: 76cd5d16e0b7343a9530f7ed18254694485d87609dd0ded26f7c53f6d083055b
font_01_sfnt_off000120cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CB 16892 bytes
SHA-256: f68beb271bb548b0bbebf3d781017208469dd7a0ae2b08c2ed9320382720867a
font_02_sfnt_off00014c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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