Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e648afa86a6bda…

MALICIOUS

PDF

85.7 KB Created: 2021-09-07 16:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dd3c8434b9eee6d3323a119b74a5d065 SHA-1: c6ff7e839361e24cd59bd1991f6bd99b8bce6cc7 SHA-256: e4e648afa86a6bdaa7ea8a3bb289dc0f2be001ef417c8b75b30e543483e27a97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crysiq.ru/uplcv?utm_term=introduction+to+python+o%27reilly+pdf PDF link annotation
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/2422a410f32defba250802b60d2a6613/kisexiwanilesogobide.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872613ea254---34411662298.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/52965409048.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/27035128366.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1ae96d888---masumenuzab.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/10055839968.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/88135084153.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16094b2017d69c---felaladokejudikojanu.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/dovidaserep.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/041ef9bc8b1613254ac0c742b878845f/volixupodalizotise.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/diwezopu.pdfIn PDF document text
    • http://imaginove.eu/data/Files/pubekenupezatax.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/berarujufiroxon.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608083f7b5644---mulenazuxedeba.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a45a2e68012---panugifo.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/sikurekudititabotulowo.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770addb6d27---48880484371.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/vapole.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/92592697272.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070f0dbc49f8---diwumi.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bddc257e9a2---xepujijokepedovujulakem.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/b43aad7450c0074ceb614458faa235c4/badujesugeg.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/gawefamoxonufesika.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_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 10588 bytes
SHA-256: 94d0178f2c808bc0adb88cf1b1b2119b65898b600566f586a8cb4b003fad28da
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 18080 bytes
SHA-256: f60827b70f2b5de80f3fd8240ab019618eb7bb1b5d3397c5af8645f5c984125d
font_02_sfnt_off0001310f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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