Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d46e6bd872c8c1b…

MALICIOUS

PDF

88.3 KB Created: 2021-08-10 13:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b7874acc8d4692c04ae41112e432d568 SHA-1: 00a9a8af0e522790842db63f3bd2bc8c6caf8e94 SHA-256: 1d46e6bd872c8c1b667736e8ce23d00fb47bbc6a4400b560e13522690450ef72
172 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content. The presence of embedded JavaScript and links to compromised WordPress upload directories suggests an attempt to deliver a second-stage payload or redirect users to malicious sites. The heuristic 'SE_DOWNLOAD_BUTTON' further supports a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://scmsalliance.com/clients/864514/File/xevanuxadiwowa.pdf In PDF document text
    • http://decaldankinh.net/upload/files/pidetelasubetopax.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798d054d9d1---54850526730.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b0e87ecbd4---vinosiziw.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/7fe51d8d02acb4bff47480627191b71d/bosusuzalibiwujotofopeva.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5f51689b741043f74af48b64c3478fe1/medesogag.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740235b2787---najoxovilan.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9ca1f66a---loxobiwuvafeselafexale.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160965a0caf692---nopaba.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1610e1d5ad9033---8526669281.pdfIn PDF document text
    • http://atya.eu/files/file/15237989034.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607076314482a---8723885201.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/fufurusogoxorax.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b273bf2b27008714ca06516244c0d8f4/31883110971.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/e47f3d8c6acd2ef110cc65992127c034/90722400168.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/36493311488.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ed6751b363b34de8f7cc22128b5d33a/88941184185.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/lalefosatamomiwafazib.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/jobominobovesaw.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/gadibutovetegubibupofenuz.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/fifojotutoxosuropanamogaw.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/91a838a881fa962b6b383b8e20c67085/vuvupasazukagub.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2b76c6d5c---nelak.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/difirisasenebukewalulow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=mini+militia+hack+download+apkpurePDF 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_off0000f3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 10880 bytes
SHA-256: d0d5b14876caca5697125738ea1591d2df0717e6967cd54b3e920b9852fac34c
font_01_sfnt_off00010ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE2 17536 bytes
SHA-256: c36667a15aa9359747f62294bc86cc3b02e0497c8ec7b4fe4f90f0d0f925be36
font_02_sfnt_off00013a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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