Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dd5c640540103b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 07:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f7246de3584082fbcf12d02b6a35064f SHA-1: b2bf947206bb66b5f87404908db6996fc811d35d SHA-256: c9dd5c640540103bdb72f35cd7bf3e9c436a9061e6c3ed41d43f45b38b1b9cea
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 an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a link farm pointing to compromised WordPress upload storage suggests the document is designed to host and distribute further malicious content, likely for phishing or malware delivery. The heuristic 'SE_CALLBACK_LURE' further suggests a potential callback phishing or tech-support scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://av-jet.ru/userfiles/file/55451662372.pdf In PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/f2u61dc6hb0av70g9tm3ie6ogi/tukunon.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/wotipafiwes.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/0b686ede21b3e6acafb0f7cf0d687d73/67077639403.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/dasatugarakubaf.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/vesanikupotofunimamebov.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0b253b4e51d625ab6ecb69a78aba5389/29823558463.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/dawafotolubojirur.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/nobobevefiwufum.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/59002644968.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/kodaruxanexopurezigozen.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/kusiposubowefaketadigira.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/33386211947.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087827bae9b1---rivop.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/33764749926.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/gezegemiz.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/2554228046.pdfIn PDF document text
    • http://klefmarken.se/upload/file/xiladejajimorowuzi.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/39c072d2c905ba12b893d37587013ddf/55963500686.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a173b7ab6---18895901500.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c217728637---90222121096.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/jotibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=dixie+chopper+mower+manualPDF 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_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 10660 bytes
SHA-256: 9002be88218656d7b659ae4c708f96c66ce4ea0bde2c8290f488323f0e59dac6
font_01_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 19000 bytes
SHA-256: 8b424e99842f245050f8f0e1b2fd348477ded8e932e03e18cc8bc04e98d6b854
font_02_sfnt_off000128de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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