Malicious PDF — malware analysis report

Static analysis result for SHA-256 2427c02bfde16a93…

MALICIOUS

PDF

94.2 KB Created: 2021-08-10 22:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9dadfb19282a2035bc93af52f5326dd1 SHA-1: d031090c74f66ce214c09293b6337118ad2cb17d SHA-256: 2427c02bfde16a930411ecda5235691053618773e99ff128ad513441252ca711
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, directing users to potentially malicious websites hosted on compromised CMS platforms and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to exploit user interaction to navigate to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ea3ead192---17611226637.pdf PDF link annotation
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/c457b4838de6cded5295b6e14d11bdb2/82051021569.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcc3ea0380---41080306445.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/la26uitlvvhjedjkc5rddst7n0/tosawipuwe.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210612055811.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/dazisapinawafadibawovot.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/jefoboxidonilopizu.pdfIn PDF document text
    • http://salt17.com/userfiles/files/difuzu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b61cdb6a00---fiwepek.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/gujujamaxetu.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/wuseduxamexadexetotixu.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/1110674902.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc659fc13---wigevunavuzapasefoji.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee9e332328---worifusulel.pdfIn PDF document text
    • https://superchills.com/userfiles/file/80628144199.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f07580788fa---76511751667.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/19095969239.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/f1d00fc1f13bb79aa028374a351fe1b0/kubakazitagosiserizib.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/m2cmpi66aisbgo36h5t1rr58pm/25204718141.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/27588054028.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083042303806---5826687926.pdfIn PDF document text
    • http://kunbot.com/upload/files/mosunupazadisebudajibu.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dbcf0fa30f0---54370909318.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160752237c0f64---31320393234.pdfIn PDF document text
    • https://j26clean.com/upload/files/3061390944.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/37049695500.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f0rrdkvuut8rj0cd469o8ir230/tofizuxosidekodarosudalos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=reading+comprehension+activities+for+spanish+classPDF 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_off00010b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B48 11180 bytes
SHA-256: d5c6cbe789249c2d90f7f449cadc7b3ca43b8cf42e9a2aded30e3dcc9f2cc99c
font_01_sfnt_off000124fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FD 16520 bytes
SHA-256: 4a7965e99715db67c4f1f57503a7c3efcf702717764e6b25645304084fda15d9
font_02_sfnt_off00014fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1