Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e004ba201b0807…

MALICIOUS

PDF

90.6 KB Created: 2021-07-31 15:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d2aabe0a51e637ebe2b0bc9991352293 SHA-1: 8f4acfda261ef53bd3ad872a11cc159a849bc38b SHA-256: 70e004ba201b080755b03c5fc341a835b9cf8b6069b2ddd1f92c1b21717c289c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The embedded URLs, while some are marked benign, contribute to the overall pattern of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://studiogaleazzo.eu/userfiles/files/natusotozise.pdf In PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da71b5d539---pofovuzeputotavojoto.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/h5db3coe6ct2sf615jlt7t9gbs/46152817212.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3cf160b9a33f1be66a1f063d32708000/96771777970.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/20487667666.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/basosaxotijazakuba.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/48112690138.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/milabifobal.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/9905716959.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160778a565d3dc---siwanirinewo.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/rujibivumusubun.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/nenovemabedawiputimeki.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963a95c7893.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/tadepasemumofa.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/3286106358.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160adfc951ba1b---95470814548.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/gusapipoxobobebinoz.pdfIn PDF document text
    • https://angkalaris.com/contents//files/noviwu.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c317232e4c---midawodonilobomabosin.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c482725cbf---kubejaranagaza.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/jerenugukoribolotitenibe.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/jajizelexulorikedifusor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=download+windows+10+1809+iso+files+%2864-bit+and+32-bit%29PDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/namebirunabuduz.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_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 17016 bytes
SHA-256: 67b3a4086307ab7ef8668e3e1a99562c45916d85092ba111e2639ee1b192c166
font_01_sfnt_off0001282c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14043 11752 bytes
SHA-256: 13244fedda90101c7a25f294fe2f1d1fc74dc9cece7ee57e2e7bef7afb10f758

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