Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ba21c37fb3293c…

MALICIOUS

PDF

75.1 KB Created: 2021-09-12 23:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d75ff96c92fc8bed036496756da12a2a SHA-1: 72294c9dfca2c2ef0ceb4a46659bdf7f51c92ad4 SHA-256: e9ba21c37fb3293cbc7c648e4895827f808dfa2661da470ff94470579b58ed6e
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised or disposable hosting. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 http://aasghsflqsae.handylover.com/upload/files/10334761413.pdf In PDF document text
    • https://mvmdigital.gr/files/files/gixojuvuzewufufepodop.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/rasofimobeduziwu.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/88903556801.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/dowegorafuvimevujosinake.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/fifowotokumevazi.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/19157234751.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/94183678645.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/siwika.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/kamiwegamunugurex.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/birixawidovijadu.pdfIn PDF document text
    • https://kaimano.it/file/zirage.pdfIn PDF document text
    • https://wsbtitan.com/images/file/13541183110.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/sopafiludodibutuluxu.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/buxofojij.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/56030104562.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/61897846620.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f34b7980ea9b3dbf915ae7c6cf7f802b/tarusizufoxovuxibe.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306921343c5---63168929189.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f293b6d54---12454972593.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/36107015984.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/98235930141.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/18698277515.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/53297391391.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/bisifeluburusafokub.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613aff8f1ca8a---7022559833.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/letajajubebiruluvuset.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pakeeza+anchal+novel+online+readingPDF 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_off0000c4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DF 16124 bytes
SHA-256: 6144afa21d3fbec55956825674674ab576ff1d29867a926788c432a9ef36cef3
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 10600 bytes
SHA-256: bac0bf0f23953c0a6ea40b973873b4c86714a88bf4d77f2757f77d97c3a36eaa
font_02_sfnt_off0001061e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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