Malicious PDF — malware analysis report

Static analysis result for SHA-256 212226869217b520…

MALICIOUS

PDF

73.7 KB Created: 2021-07-24 08:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92e9fe9d7b9e25016e56a0de79060cb6 SHA-1: dccb21cc919d1b9bac35ad64a1461bd6cd387316 SHA-256: 212226869217b5202224a1f98f0867a3b4092263261152dfa91666875bc2e416
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various domains, some of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to malicious content, potentially for exploitation or further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://foodphotoshop.com/userfiles/files/puvuputat.pdf In PDF document text
    • https://semagro-msw.ru/pics/images/file/81403744138.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8df840ff74---gixer.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gc53qunhr9dtmpl87mq1drcuq2/davugonitapowufu.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/6915dd5237d5b4343695bb061469f9f6/mubujokozofedevaviteri.pdfIn PDF document text
    • http://amdind.com/userfiles/file/webotaga.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ejogevaz.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/13168176475.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/aeb2bd8d3ead13ea8318e1f7486cb628/tebalawimalagaduza.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/zivixasedegizolulugi.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/poxowafarotinijo.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/32245089737.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/76402846682.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25700177029.pdfIn PDF document text
    • http://hotstamping.pl/files/file/sejosufejolasuditosaw.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/8j9e9lpvq71snfh899avrr4tt7/19404408301.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/dakukedoges.pdfIn PDF document text
    • http://abc-tel.ru/data/File/11516020047.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc5e485ca4---54132065351.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/togowuson.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/kubin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=youtube+to+mp3+convert+online+y2matePDF 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_off0000bdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E9 15896 bytes
SHA-256: db9ab2b51e8a84281a409d2e13ec9aaa79ebae66bcf6927c0ebeb053e05f66a9
font_02_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 11064 bytes
SHA-256: b559947f353d387e415cb26b45cdb2acfe9488b98a0d8e8f501fe61a3b513683