Malicious PDF — malware analysis report

Static analysis result for SHA-256 953b47ef7185a665…

MALICIOUS

PDF

104.7 KB Created: 2021-07-10 00:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 74a73f7b6009ed6feeb90f19cdf9bacb SHA-1: 39654fc39b0cf0d841624ae8932353e001847331 SHA-256: 953b47ef7185a665ab3f71b477f49cf448197be066316aad854e847e0ae2830d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/35036970200.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607531b12909e.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/razogukuwaxiv.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d974acea01c---31005410802.pdfIn PDF document text
    • https://blokhol.com/upload/files/zoxetuvaleloj.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/vurovasi.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/3d977bb667bd42bfdeff74f17890b36e/53531323912.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a334da50682---wobaxuwagogakulokomajato.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/4071344801.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/50379290945.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c516b57f039---masixixobitidizal.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f58a05bcf3---fuketadal.pdfIn PDF document text
    • http://airsoft1.ro/files/file/sojomatemofifa.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/518fa82dbc4aa3a821f3ecf45f1178ad/razemil.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9b6d09c8a---5240396443.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f0a6a4f99---tokude.pdfIn PDF document text
    • http://expresskaliski.info/file/zimepilovevab.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/07a1fc22fc81c7302b5e432d7e073c7f/67773037078.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/tunabasola.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b32f4e5a579---65589987622.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608332becb98b---56697710546.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210508211041.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/94216992814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bee+sting+no+swellingPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 10160 bytes
SHA-256: 0bb543b0e2b4d2abd5ad69a288a26adccf71d7257ce4923b4068e4420273e88c
font_01_sfnt_off0001511e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1511E 17292 bytes
SHA-256: c9e7137247215bf7ff8872f35f1c25d2275fbce0ff9cb0defc35d86915891957
font_02_sfnt_off00017dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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