Malicious PDF — malware analysis report

Static analysis result for SHA-256 245d403df71f85eb…

MALICIOUS

PDF

89.1 KB Created: 2021-09-01 00:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 82030c8dd7ab20af4e9f7b559cd220dc SHA-1: 866f7f6e657fdcba946e0f965bfeffa63b3450db SHA-256: 245d403df71f85ebaf535f599498d8b042320b48b6822ab5095a4791ed89a3fd
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, hosting numerous URLs that point to other PDF files, many of which are hosted on compromised websites or disposable domains. The presence of urgency language suggests a phishing or social engineering lure to entice users to click these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mosjob.ru/images/file/kolirigiwitalaguvogajufu.pdf In PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16099605baf247---tolagixazaxutafa.pdfIn PDF document text
    • http://lucann.com/Upload/file/fobasajesiki.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/820143cc09e96d2cb9d2521c8199e8d9/12383002302.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/b3f4628ea98f6ab489738f684f0d67ac/lobakuzowovawo.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/22256268377.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f669fedcbd---lufosepi.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/52795312873.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f3f18e731---pelaxorinimo.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5099e7a47---bexud.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/zilisavidaxamo.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c95c8801b3e---kavotodupusonabifinibi.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/furigusudasezegij.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/narebujekufomarilatatozin.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/duvexajofokuvozuzi.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed77919369---27367868378.pdfIn PDF document text
    • http://rescue119.org/userfiles/file/damasidejojefa.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123968307998---kikewabuvupokozidaros.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/99944023984.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/14208316649.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/pn5pode1803e7eadvtfgob1a2u/18287551009.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kevirake.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/nupevopewumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ephesians+questions+and+answers+pdfPDF 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_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 17872 bytes
SHA-256: 65d2cae55d6ee6bd7bb79a0bb86ba2d77e3d395f2caa261393f35b5dc427c9b0
font_01_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C36 10864 bytes
SHA-256: d71771f4f423ec9d0e44c382db174b7ac48e1f833676fcd3116091cac6d1c43e

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