Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0386f018ee1bfd5…

MALICIOUS

PDF

157.3 KB Created: 2021-08-12 09:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e2f3ccbf5950ac8be85fddeca58fe43d SHA-1: ac783e3d53afaf3cc3cce613cb9a82f24526f213 SHA-256: e0386f018ee1bfd5e6c4c320447fcd23c9b63e97549d213f27a889a67ed2d7e2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, identified by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. These links likely lead to phishing pages or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9516

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://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160daf370ac14e---vibowemubim.pdf In PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/83614891328.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88f35ea30---13486972525.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a221b47f3---winilitaxagatawerapuf.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/37137638962.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/viderenuxezuweguvag.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd99624c1a---pepaw.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff02de3e2d---47755075568.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/68199878720.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/v80lkgpk9547si1ap67hit0heq/42471267316.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/038ace2b57017b93b2110d74ef776854/80853721681.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/norupomupepata.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/51235856616.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac68952e2fc---majaditometo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9293fb1177---49781000815.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/5941277855.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/sapuxunupowatepomefori.pdfIn PDF document text
    • https://elektrona.cz/files/file/18946290048.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/banuxixewitelaxijudupo.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/0c3cb480eb71311f2af33846987a28dc/44141711296.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/vavagepizupetegikojotexi.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/zazan.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/34cc2ebcc2d84cefcd9253ef7024faa0/pibimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=2019+dodge+challenger+hellcat+redeye+production+numbersPDF 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_off0001faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FABA 20548 bytes
SHA-256: 5ec6cb4c8195eddc90dbb84556d42e58ae7f9dcb597e68972e17c6885d67c310
font_01_sfnt_off00023063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23063 11680 bytes
SHA-256: f7a7575364135a3a210e6d5d0fd2ef7b6a31b5ab7cf9786a7e2cef0e5b70429d
font_02_sfnt_off00024ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24BA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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