Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be1204f57a2ab85…

MALICIOUS

PDF

89.9 KB Created: 2021-07-10 02:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 098ebd981cd9e91740bf7f34814f4158 SHA-1: b787ddd42061248adc60c98734109eeea6ba5a60 SHA-256: 9be1204f57a2ab85a2579a508d1350503c245f1ee41de6c1a907e2283cb4f358
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage, likely to distribute further malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to leverage SEO for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://big-affaires.com/img/pics/files/50679246438.pdf In PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609177d0d1f13---liriroxunukelize.pdfIn PDF document text
    • http://moristas.com/userfiles/files/13949714366.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/e084ac96f60b2c37e40b5e9e84db633b/lapadotonikigexo.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/40530883738.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/47781637737.pdfIn PDF document text
    • http://indel.sk/userfiles/file/64862589054.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/9b671abbda3a2e5a79ccf00a3bb7769c/89077919918.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/26791179090.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a893f054f---28938778850.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/c016bbaf199769c4df5cad4a69a627f3/44389593608.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/72586855682.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc45a32c916---90586940904.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4ecc8380---46365083362.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608870f93e5e7---sanumabepoxov.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10136eb27---pejitejowuwafurakafe.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/60022973504.pdfIn PDF document text
    • http://bjjiffy.com/upload/ziwomagele.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/27248141022.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/guguludubituzigolifuxopi.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/dopika.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/rajezizatulow.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fc13cd59---xovazogot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=law+of+magnetic+attractionPDF link annotation
    • http://irodori.kir.jp/files/file/nobirebekufoxujituki.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_off0000feb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 10508 bytes
SHA-256: c5cd86215e934ab158738ed46a593b0ea3de5386db5270bdfdd9820544bfee3f
font_01_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 16976 bytes
SHA-256: dc019053d00825943be12bd397039e5a6b2a3efb3a7a66f42a486270aaee1104
font_02_sfnt_off0001429b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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