Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27002e75ecf3374…

MALICIOUS

PDF

89.5 KB Created: 2021-06-27 22:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 38d4cc7751b688b3cd60a8afe276de49 SHA-1: f653b40d79d2b22f06aa671361126f83e3b71d50 SHA-256: d27002e75ecf33749148d8ddbc2870d55572d3c1618e5e7bf3581e2ed73bb75c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites utilizing the 'formcraft' plugin for file uploads. This suggests the document is designed to lure users to malicious or compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f21d1740b8---kubebunufaxilasujarid.pdf In PDF document text
    • https://caribemed.com/userfiles/file/52302989239.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/piwudixajifozajosanu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609418301c539---kisarujokexotegojenoruw.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cc03b24bf---kiguguwosodavajerulefifab.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/59757469609.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/9112009474.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/wokudofamev.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/77166764025.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/panif.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6e3e42ae---dunevogu.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/bosadadefusovuzuje.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/91978847314.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3bd314b4564b95ce7c33400f0be10e20/88262775996.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160718b6a21187---didev.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/vhdduabdbdn9qn6jdslfov74is/ditapuderoso.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b8123eedd26---40540265670.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/tiduluvurufabobojas.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/49774512602.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd86ea524d---74506242806.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e8f2256a0fc1ee0e4ff7d6c8f9fd8f7b/95051532541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sickle+cell+retinopathy+treatmentPDF 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_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 17696 bytes
SHA-256: 7dc96b042dd7046059ae2aa826f96f8fdb94fdf3eda09809facd0eb0fe96363c
font_01_sfnt_off00012855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001406c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406C 10752 bytes
SHA-256: 726981b1f6bdf714f41d903c20ddc2c2481cbbfaa25359030645faf6658763b2

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