Malicious PDF — malware analysis report

Static analysis result for SHA-256 7241f4957fcfa05c…

MALICIOUS

PDF

86.5 KB Created: 2021-07-06 00:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14264c5357ad70ee705090c9075264f6 SHA-1: d4f513921d4fb3268a7f7a1d9d155ebd165b2d01 SHA-256: 7241f4957fcfa05cd353050ea2d6b3e15576acfd07bb49ef4d61878e6ac69ed6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to compromised WordPress upload storage. The embedded JavaScript likely executes malicious code, and the link farm attempts to redirect users to external sites, potentially for phishing or further malware delivery. The presence of multiple PDF files in URLs suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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://conservativista.com/js/ckfinder/userfiles/files/ribuzu.pdf In PDF document text
    • http://asiadomainstore.com/userfiles/file/gixogo.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c307eb874d4---6051357302.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac1bcd46d7---83045706223.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d631055564---lagawedibazitov.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/l7dc18aslvsrgn8n0es7d3kuvs/12380550012.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160926e2247056---59477754850.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/c630lgck4lehu424om6hf48eql/posoje.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/14793074068.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/litojukafatazabi.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dbe1bbafe---90369432112.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/53275773721.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/fb5509b72ee4852bf5959cb5b31e4907/jetumosexekitoxolifobene.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f1938361f712c15704d9f4119dcb7456/dedarulujuzaluwo.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ce53e079f---saxatibusovemanuxadudite.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609278c7ab465---29462053352.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/0db1e1a428f7bf8d346b03c668f29ed5/vifagixixamolizo.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/viredexenedanugevinigak.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/39af4fa42454fc781a1f48a192189d1f/79660676833.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf4d5663b0---40505106017.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/82fc1f338ef22e90fb4d9a240847046d/14268849372.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/7a7d44b13f83133d0e29a2fd74500abb/wimemapujijujozabeluxaf.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b60aa74a28588cb7b9811f23ba8f69bc/dovalamijonov.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8c4c30c45ee229b1a86646777335dd6a/gosuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=lower+order+thinking+examplesPDF 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_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 16920 bytes
SHA-256: 187789a5efad5d75425dda905c44f85844a517d601a138aa889fccb2fdfd9d49
font_01_sfnt_off00011b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B59 11076 bytes
SHA-256: 6c108653a80ce517ad09df81628dca46e75f54371885432d24d86fbfafc9dc20
font_02_sfnt_off000134d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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