Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7eedd78d2d5d8d…

MALICIOUS

PDF

90.3 KB Created: 2021-06-29 23:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 51629cd2c8576b5c862539ed56fc1592 SHA-1: 8bf4e06c730b1f0e1b1f08a1ff273202f8422e91 SHA-256: 7a7eedd78d2d5d8d1ccabccc50003c9c84c23f067bc81d9de055950557b2df56
104 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a link farm hosted on compromised WordPress sites to direct users to potentially harmful files. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a deceptive download button lure further support this assessment. The document's structure and embedded links suggest an attempt to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=goffin+cockatoo+for+adoption PDF link annotation
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dab50cb9b---wosufuzasukovobepeveku.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/89139575372.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9de97957---67349922523.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/9k1hgl8tmbd4p3jim62midp0am/lonorulukesedena.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/jajox.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/pk2t8kqajtlg5euto20s6kv5s3/bapugufu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16072b9e437cc4---64926954304.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f10932f783---46195411095.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gdam8jjl6a99j4k94goduq6be4/goxaxada.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/26741288970.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/72780827726.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5461a5b5f76f52ff890e6dcf02cf80ea/80854243079.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/ralixadupopozuxilomi.pdfIn PDF document text
    • https://bloomeng.com/uploads/lujibatumoveke.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/cb57acaee1a6a9ba153d7d308e540659/kiloxiwob.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8baf9c24db---liligugilularudedimul.pdfIn PDF document text
    • http://fittbikese.hu/files/file/37989895210.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/868d63e7d166a4ad0566711b71e7f99f/4855166654.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/rokeva.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a092f550d65---witezefejoxaborumig.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/fac69ce96c0ea327d1951d01910d6891/dorikadaker.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-23/20210623135901140197.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f53985add---xaxirufutugofesuneluwu.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/6feb6c6b120cfddceb594d36adade74e/53217131211.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/sejofutubedibozure.pdfIn PDF document text
    • 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_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 19504 bytes
SHA-256: 4b76e6a0b50d52c8cc200cecc6abfe3efaf96e3fb2e406bd8f36193cb060f296
font_02_sfnt_off000142bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BB 10400 bytes
SHA-256: e9032a9a7a3c4657aa0dfda51301d33317048272b320baef164547652cbfa397

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