Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c0307c9e1518cf…

MALICIOUS

PDF

72.5 KB Created: 2021-09-13 04:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79c44458ca74d56228d98f84d0895e1d SHA-1: a3172b20eb62ae854498c07e3a029506d1c45a0c SHA-256: a7c0307c9e1518cf146b3700427163781f12b896f72f489110972c5882bbb49f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of external URIs and link farm heuristics supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://pribatu.lamilagrosaimport.com/images/files/bopojotimenup.pdf In PDF document text
    • http://vswet.ru/f/17535532842.pdfIn PDF document text
    • http://4rrecycle.com/files/file/mulodomegakod.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/30628629147.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/jawakapixuzek.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/21147323395.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/93396186764.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/69918445407.pdfIn PDF document text
    • https://morabia.fi/images/file/47269199549.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/3997884427.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/luvuxojibonirik.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e79751e5f6---nolifelalixuniki.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/43d12232c2da9ff1cee1fd3a7f08a087/58120172330.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210910115510933.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132a79155a8c---kabaxilenev.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/kosefomuxiwa.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/xetekopej.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d796e3bea5---pigoterota.pdfIn PDF document text
    • https://krusomying.com/data/file/nebige.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/mum4v3hq8p1c25friahtbkia9k/37468506536.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/lifobimax.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/pikuwosiwuzazapififunigex.pdfIn PDF document text
    • http://tchid.net/userfiles/file/45879758510.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/57922244243.pdfIn PDF document text
    • https://www.e-oswiata.olesnica.pl/ckfinder/userfiles/files/vikow.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/vewotobolufexigu.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210906092024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=360+viewer+app+androidPDF 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_off0000ba51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA51 16244 bytes
SHA-256: 9deb73913f6256600fbd1803568e878e6348793d831eef95a011ac1bffce600f
font_01_sfnt_off0000e3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 10588 bytes
SHA-256: b7a34e47ca9267c5d0db141dcf2842f1a70a61fa3cd7c4962261113b82b28c45

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