Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9116479f9015f3…

MALICIOUS

PDF

80.0 KB Created: 2021-09-20 20:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dfb6931cc2be82ef515b18cd2c1e620d SHA-1: 6308ab87c75d46abedbb4f88333f99826d8a8ff3 SHA-256: fc9116479f9015f3a3dbf14b105ed948571bd374319e68d1e9222e2eb747027f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, directing users to various external URLs, some of which are hosted on compromised CMS platforms. The presence of numerous links and the nature of the hosting suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=gps+data+apk PDF link annotation
    • http://srtcivilnorth.com/ckeditor_file/files/2547864854.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/fubufiwumimogitip.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/fozajolu.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423ff588513---pilimulabijizuxutufuxo.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146fc2729e33---56798662412.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/zozodi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d942de4dfb---63016169992.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/xisafesaziloz.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/24188076003.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/vazutaxexevazopabage.pdfIn PDF document text
    • http://4darchitecture.org/img/all/zisebew.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/86934065559.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/35865866249.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/84593807773.pdfIn PDF document text
    • http://baove247.org/upload/files/dupulejun.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/fukoweboriludamojiwet.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/medazulaweje.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090701545473499.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/96249140034.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/tojezixeliroxuvozetolo.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/luzinijejidagaliji.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/013459f2bc8de4863d56a8e0fa9de5b0/wovox.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/vufoxegubinasepu.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/rufif.pdfIn PDF document text
    • http://myarrahnu.com/mo_images/files/zolopuwajov.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/nosaj.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/78821281443.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_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 9920 bytes
SHA-256: 0139d2d7c0d1e07eb2928afac34b13166641094e90a095f71444a89e9b3f6e45
font_01_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 17920 bytes
SHA-256: 55206ac99ddaa36f3a47e6113e8cfa04245193b9f86b9410e52f5e6201c50cfa
font_02_sfnt_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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