Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63a2f6c56ba4ded…

MALICIOUS

PDF

85.3 KB Created: 2021-07-03 02:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 40a30c444ae43e1df5cc1fc967af2b84 SHA-1: b5ba7c36c7fb2b4865eeb42e3b637847f1fccda1 SHA-256: f63a2f6c56ba4deddd3135d31dc888784c72d54760bc20935ad948f082883b3e
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 Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=count+your+blessings+name+them+one+by+one+scripture PDF link annotation
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/o9k86esqdm9tqprfetdhp9ju34/sepawisemenizidike.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/54372030952.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/3b7004cc144a97d5d0dfce148ee61ebc/xowef.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a26d3f73fa8---muwekapufalaxowunegupoxil.pdfIn PDF document text
    • http://brukbet.com/user_images/file/marejapadozejuravavizad.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d93986bc99d---62603710919.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/xusolexumepoxaxe.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/53955753084.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/5634895155.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/15610400288.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075f18812a4a---fezipotonaxerokune.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808f80a6cfb---webuselixegelal.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/s8g5c531rqn4kjhc0abc700rk6/71531343105.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/kegumiluzavufujewokupojaw.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7c2694f70---zumanesibirusuga.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca2acc0fa2---52329179390.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609c47958a3b8---44702668752.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/11771330149.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/pefugisafipogef.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/b474d991d3e60aa515fe17f6557c761a/32233525693.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/b381059c09dce74b4f77e01233f8c314/nemonaxemepalavazirudujil.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0744a54d0---zoxakefokikejudupi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031ef1db29---62284730661.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_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 16868 bytes
SHA-256: ad32089fefe1229c9afa1e18f62d2be3ddd254f711f5ae6861e8595c1e18ac9f
font_01_sfnt_off00011594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11594 11208 bytes
SHA-256: 77dfe19d75afa7168ac5c3801df36e20e66ffed8528be94af1ffc8c05716e02b
font_02_sfnt_off00012f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1