Malicious PDF — malware analysis report

Static analysis result for SHA-256 7669bfb93919fb65…

MALICIOUS

PDF

94.7 KB Created: 2021-08-23 13:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6bbf63dd8ed7eb68d9d00fe59854d9bf SHA-1: 41842408a9dab20b9ee7cc2d7553d8dff780041d SHA-256: 7669bfb93919fb651ad5fac69ee590e143dca30fb33510a3ff41bbd84e31bc75
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ketchas.ru/uplcv?utm_term=mr+scrooge+muppets PDF link annotation
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f63d0581ec---94699074882.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/bevexomadololag.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/fizeti.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6053d59e4---rilevasofova.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/14391089075.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b60c570d---49523540959.pdfIn PDF document text
    • https://kenadong.com/contents//files/21681194581.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/wexesipifize.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/wetaravowog.pdfIn PDF document text
    • https://mmszke.hu/files/file/pobatamuxo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b81431b98b3aaf311fd4472aff7a4d99/vezadunisupagaxudadowo.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/58883008772.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/mekevovogun.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cb40f145c---difepiwu.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/q0rkknrjsai1illfab58n4qcsi/dumawomal.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/4582174955.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/2aba7e735d2ead79919baa7f2fa4d427/38982132386.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fe92170ae58---pikuf.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/34644772141.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/fb0c8904564abaa5be41d05395d1329a/ratokoravolitine.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/35293703868.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/sofekimenuzodobawukagel.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/24442794360.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_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 17568 bytes
SHA-256: e9d5db16c11117718daefd04828034b1ce3bc744122cbde2498e07fbf144f9f7
font_01_sfnt_off00013dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEC 10404 bytes
SHA-256: 0d380c01f51c7b81d325516e5c8f039ddd1caac1f9c47c60f0cffa1184408360
font_02_sfnt_off00015597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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