Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb4b0d075ad329f…

MALICIOUS

PDF

74.9 KB Created: 2021-07-04 15:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 696d7e710d8a99b125971f658a9620f1 SHA-1: 5ac68f627cb9e503e65a71e51e5543cbe1966e83 SHA-256: 9eb4b0d075ad329ffc21efe9847b9d226726842a6d2bd8ab83374565743a7431
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a link farm designed to obscure the ultimate destination. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of these link farms suggests an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://alarrabnews.com/images/content/content/file/10744599130.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9fe6479d---1825948703.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/c381mahk6qg802v0030jj3s7v5/fanixotetusakitaginiwe.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/24450670025.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/a6fca1a7281718656c28c1363b94e914/23069108312.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/3353555787.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16235549168327.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/93494801289.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160876f6e96368---90335613147.pdfIn PDF document text
    • http://azizolace.cz/images/file/jubolipegexuse.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/manuzokivawu.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3c9ac89f1---wozawa.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/ketajifefolo.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607452e86c4b2---64604295229.pdfIn PDF document text
    • https://red-adlay.com/upload/files/68711074160.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a55a8fc33---jamekuxoperovu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4aabc9a96e2265c6b92aed0112186901/62538420796.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/firesejumugetajodivab.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160755c6203d2f---68759741774.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a470d6ab752---24431688250.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/atrq9fpji7knlnnrk7sc0i05qa/tamexosedam.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/dipojeme.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/faxobazapoperususofi.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9a6324b4---zobitopipivovitidixif.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/22936255781.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/80g9omns1pcl32mgjpltbro2ce/20413547098.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/79781556563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=narrates+meaning+in+tamilPDF 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_off0000c249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC249 16444 bytes
SHA-256: 102c252e492e22702bba5df52baa2dfbebca3168afebed15ceb83a8388d702a5
font_01_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 10308 bytes
SHA-256: 361026a70cfe80595d65b9116b9ccb1902503fa3b0c0fd713b817ca2ed39df5c