Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d5f7ff5cdd4ba7…

MALICIOUS

PDF

87.6 KB Created: 2021-09-05 01:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0ef9b6f3aeb453f7ac037e6bf9b045ba SHA-1: 811072ae166081f1dbe6a7e54f5e49ee687b96a4 SHA-256: 94d5f7ff5cdd4ba7cfb030537289dddffe358a432955c26f11a82405c924f1dd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised WordPress sites and disposable hosting domains. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/49225680546.pdf In PDF document text
    • http://curry-box-deluxe.de/userfiles/file/67688101775.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073fbd6850a1---dotaxufobumowoderilimuz.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/74191303774.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/lododiwunukogebimutu.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/gezavuwevotogiban.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a889be02fa5---xupisesa.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/62896692036.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/6a7d2e89bdcb6c24c7356112a56441f0/wuvemubinebubawajeferak.pdfIn PDF document text
    • http://aliotoconsulting.com/clients/862286/File/videgimalojibobamuzor.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/zawelalonafazaji.pdfIn PDF document text
    • http://akademibt.com/resimler/files/58824822906.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852fa48102b---36851108091.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/10356304722.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/15177474365.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/643a0aaec57c6eb06a247f5de0497b7f/52009541576.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/wemipawipaduwekatibo.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/89ca46685b32a62ea9b5a5ae856a0fea/zulirusigananud.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70325eb4d1---56010933532.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610cc518660ca---remaxalojuriveniz.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0886f0634---wupilovirozaxixapu.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/bofevu.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/3778247951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+pdf+free+invertebrate+zoology+kotpal+rastogi+publicationsPDF 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_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 18888 bytes
SHA-256: 0b94a834d2574fb0b33fe686e0f0d19e8f0c05c4c040afcd6afa6a648928f3b0
font_01_sfnt_off00011cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEA 11456 bytes
SHA-256: 367164837ce429fff808d9f4ddc2126a999b6aa03848cc93cc92251541b59c11
font_02_sfnt_off000137cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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