Malicious PDF — malware analysis report

Static analysis result for SHA-256 261b685f78348eea…

MALICIOUS

PDF

85.2 KB Created: 2021-07-12 23:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 87217e6cda77c6ec621238bd25b1431d SHA-1: 8cd3bf5c543cfb4f1c1107eaafe4b13c7d95b6dc SHA-256: 261b685f78348eeaaeadfa8ce445716acef03dedc7e3bb336ed36044f9321f4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to phishing or malware distribution sites. The PDF structure and embedded links are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://oniceh.ru/uplcv?utm_term=marry+me+for+christmas+series+order PDF link annotation
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b52857a1---88297389047.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/08853a8a7843981da173efa2ec5aa285/diporoxovela.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8b9aaba8e---1052688438.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/22471983234.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/0esoaoa4mmfoes08r4mjgflec1/dunojitasigujedifirekese.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/38386436615.pdfIn PDF document text
    • https://panama4d.com/contents//files/sukenixis.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/44223752852.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7f7ddaf2f---rifotolux.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14cd02a758---dogegizebaturava.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872782dd0ca---zigubutajevuxu.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210629_12F422050643AF80.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/20476097744.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/11104540545.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ni5539nfvrj9e3capsjs5ab18v/31581908172.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///64096103425.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/19739988417.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/satawew.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68e1e8bd4---35643175314.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/61326604687.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/xoviwodejinoteleg.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/jovolopotav.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0ff14ac33---53707710251.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa3c91f91---28748880100.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/48605274211.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_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 10700 bytes
SHA-256: 9df7dc8119d963ab9849163d58f66f85fe6dfb2bc1f6ad89bfdf0271d2c53105
font_01_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 17500 bytes
SHA-256: 4b32f369ccbddb13c9d0f557403db827e4fd724cd7100dd54607a8423eb01928

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