Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da0444bee53bf1f…

MALICIOUS

PDF

92.5 KB Created: 2021-07-21 13:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 525a2a7331a0d6fb8164957b4b32ad88 SHA-1: c6e135ecc6af80dd539d71f7414732bd444b4e55 SHA-256: 1da0444bee53bf1f0e418e1df5ddd49960218cce22c099c4be35d7f4d8cf60b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS uploads, forming a link farm designed to trick users into downloading files. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the overall structure and URL patterns indicate a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • 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://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ee97edaf8---92222586633.pdf In PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6528c643c---35921680683.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/87917257523.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/12824568469.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/15332219178.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/38452688811.pdfIn PDF document text
    • https://camelcarpet.org/d/files/lofidinatinibetuzoneparaf.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/50046901457.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/dagiduwu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c030f063b1e---46925173197.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/32216502648.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/31098350656.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/53aad073ebecff6d3e3f22be61620923/xirudegina.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/20984138922.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfaf654d9f---lolopogaduzeker.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/22771687714.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608f41d802d29---zabar.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7a7fb8218---watiteze.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944b2427b7f---41244369029.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/27100498403.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210714014643.pdfIn PDF document text
    • http://anm-av.de/uploads/files/55458084199.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073083baa64c---sikuboruxexamonanifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=download+gta+v+for+pc+highly+compressed+100+workingPDF 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_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 17968 bytes
SHA-256: e14185eb9234a4f4d0eb26bf8732eaeac9f980d8bcce49572ff022a836730f0a
font_02_sfnt_off00014751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14751 11600 bytes
SHA-256: aeba7a926e08fb87b9fbecbe3382a2f76f90c5e42d8ee50040921a2d0ff06f9b