Malicious PDF — malware analysis report

Static analysis result for SHA-256 7265af6230dfd0f8…

MALICIOUS

PDF

97.5 KB Created: 2021-09-07 05:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34c06d5507b875c5f9d9bc8682742118 SHA-1: 5a5dc75f6f1fdce5012758acd02aa38b32536790 SHA-256: 7265af6230dfd0f8bb0aefdf0f229492a111df6a534139c7e8a16b71dc3a3789
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • 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.
  • 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://massarentearchitettura.com/userfiles/files/71159749248.pdf In PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/lonumugatolevurira.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/3fd03b9f62c7835c7499e30b5a1a2678/83072636427.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210729164341.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/1b9465407a85f1f8171a8a6f568168bc/33723805833.pdfIn PDF document text
    • http://chieucoingason.vn/files/87033059382.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/xodadefofupaxi.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/girekolomoxogikoroboveg.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/61520541373.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092112f44fb3---74600496757.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/mobesigosotewamoretes.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5598197a86---32087736749.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2beceb8ee---14635977336.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/18481173530.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/rakogol.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/govafajoj.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/pomakebovobagerulep.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/megifuxifebipulag.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210620223455.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f16ff31c7e---xizovixugasudividar.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda59bd1e6---26711978134.pdfIn PDF document text
    • http://yorkiematch.com/clients/6/65/653dc45b8f6063886304ac4260dbb99c/File/nezudifovup.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/34562657511.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/iv9oe9idpkagrjplpk6gcomavf/44331851337.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/89388583330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+color+digital+art+pdfPDF link annotation
    • 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_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000137d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D4 10468 bytes
SHA-256: 05991cb89d641bbc5e325b17f1e78b946334b7605ee091f6d5904adc8ee34cf7
font_02_sfnt_off00014f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F83 18184 bytes
SHA-256: 249e742fded82517f4c02c87eeeed43fba3784afc673809d73c1a689f727c043

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