Malicious PDF — malware analysis report

Static analysis result for SHA-256 04564d69ecd72392…

MALICIOUS

PDF

79.6 KB Created: 2021-07-04 12:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3f3200e443620d24892cdc0154e27833 SHA-1: 999895dcb240cc0927b25a88a5c9a3e143813b09 SHA-256: 04564d69ecd7239232eabe1090ca6e5601f53e67153bcd1f375355232e5a90a4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm designed to redirect users. The presence of 'invoice or payment language' suggests a phishing lure. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://medvor.ru/uplcv?utm_term=peterson+afb+commissary PDF link annotation
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/d83pstkojbk0ldj0h1llf5ciip/58625689096.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/5d505d7249ba060d10107020cc5aef93/getidifejufatowovili.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/87074252938.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210605074754.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/83cd1374e6769a1f0fba5de84b22f95b/pinalubipop.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160dabf53a93f5---45324215844.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/viwerukowowudosi.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/jijefikenig.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/hivfmor666tfkshl53sls5fe4t/wowafurelixedogekawan.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/42549763268.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7144b1bd62---marotare.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/3493121645.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/51929b63c77e3a461fe86f0dc4cc6041/63392914620.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a85ad7292b---76992097316.pdfIn PDF document text
    • http://jaatkinson.com/userimages/92605292422.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/f40c7mmb90og1gl2por48f8j11/dedomakazekidutogololupev.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/7742539ec42509879531675b4567dbb6/doxogujujixazogijidi.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/88c06a79fa1ae8b85fa04b7451d75a2f/18419768340.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/hqus7203a6gqgicmds0e6ie66t/jatalegapekabunubedorivel.pdfIn PDF document text
    • https://pindimana.in/uploads/file/gasubud.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/84614571925.pdfIn macro / runtime command snippet
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/1ruptst7pjif4o3q03m471o1md/94036442064.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd924688ee---11947322635.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/rerarusofoz.pdfIn PDF document text
    • https://pindimanaIn macro / runtime command snippet
    • 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_off0000cecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECD 18244 bytes
SHA-256: 3ce7337156e28b7d6251f53bc51067ecdcc63e0b42ad86cf2f7af2663a3b43ee
font_01_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11706 10708 bytes
SHA-256: ab4139db808e763380969772eeee516e8d6cec7cdae7786c0ed2000e874a2943

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