Malicious PDF — malware analysis report

Static analysis result for SHA-256 dccbad529e4205bf…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 16:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b3eeffe18aef7e6bb057b466ae525223 SHA-1: a22c4ab5b968823a5e8aa8c2fdb42d72710f7245 SHA-256: dccbad529e4205bfcc4a6e5b01000dbca9bcde8e65c87a5a809e325b0f461e0f
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript, indicating an attempt to exploit vulnerabilities or execute malicious code. The document also leverages a link farm pointing to compromised WordPress upload storage, suggesting a phishing or credential harvesting attempt by luring users to download further malicious content. The presence of embedded JavaScript and the nature of the URLs strongly suggest an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac9de580c---tekamatufezezo.pdf In PDF document text
    • http://stlnsk.ru/uploads/file/jekoserugotuxesuwe.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0602715f4---58976491095.pdfIn PDF document text
    • https://webmenuplus.com/images/file/94278933559.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/fitowekamukepusimumuv.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2vqlats3pog254509do9p1mbi6/lelipenejuzapal.pdfIn PDF document text
    • http://npas.ru/pic/file/denowuf.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/gopoji.pdfIn PDF document text
    • http://proxima-design.cz/files/file/jewenomememovili.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/tarepilera.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gc9o63glsjdbbf74r6peg7p77s/17145331223.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081218339ff6---40975209892.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c736ee1ca33---xugefifubobojafegepu.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc0c33a32---kajipolixepebo.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/e23186401b8939ab579ec9ce7afae3fc/41031584732.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e3d5209e---diloxad.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/j3bamngrqnvmf2k4s52v76505h/wewedikevafuzepifor.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/retuxilaronezatowowaru.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/15401733777.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/45750715510.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/96345538068.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/tixezibogusolazakaburipi.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b48ba6d18f---15601034382.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/183j7ed2rkdn5s9cuu4ck7c8qc/lilog.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/17509742437.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=larimer+county+probate+courtPDF 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_off0000f699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 17980 bytes
SHA-256: c35564f4406143cb6b5bfcead6a2d7d6a4c6310c8a1f7c5a3b5e884fda122fbf
font_01_sfnt_off0001260e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E25 10632 bytes
SHA-256: 46904126a0c43e853fa1b3d67372aee328d16c926a2b7dd123f5555f4c7bf0e4

Open this report in the interactive analyzer, or submit your own file for analysis.