Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad435897918f138…

MALICIOUS

PDF

81.8 KB Created: 2021-07-06 23:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f870815621592201df5a218b73aedd6e SHA-1: 23a3087798da2fb815f2dafdbb12ec66c86e71b3 SHA-256: 3ad435897918f138a8f2586ccbe2525a424e6226dd10f8fc1a0bfe619a175d2c
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links hosted on compromised websites, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1g70co278b6kmdo4v424qf5dk2/66399589671.pdf In PDF document text
    • https://areicon.com/images/file/91379053151.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/tisulu.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afad4ca7eae---nuvaroxinotamijupa.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/13452064630.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d1bfcaf2f---lujiwipejijurumizalaze.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/jubokuvepuvulutezabebol.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/a75f6vevaf8tgbcc8ml92uanj1/31260806454.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/efi92lqqgojsrok1fmiv85f1d7/16184063464.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/3f6e304beb758d57f3f91a81da60a8a8/89212714874.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106140145567940.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/uj9ikjhnb0817aa0ubrn3elsg3/73584539999.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/lerorixuso.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b7fadf3889c46e9b82a1aa2bdb41cd9f/nopumokojitexunet.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5c4edbc13a398c633fd28dbc0a5300af/29864332156.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/ketowijewi.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///jiwuver.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/jakoveno.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d68740d10e---xovotawolevogivugejawifi.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078525f7b912---buvagavesurugexapo.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/zoroti.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/26056584510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=stata+16+software+free+downloadPDF 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_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 17016 bytes
SHA-256: 884b9d360a96b2221e0a12611e32604d983df82c607c78115308440cce8da79f
font_01_sfnt_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 10636 bytes
SHA-256: ce578f5419fe4380558a645b6abfd3eda7c6eb541d12656c381f5f02afe8a394
font_02_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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