Malicious PDF — malware analysis report

Static analysis result for SHA-256 7590a69c0fb3ea67…

MALICIOUS

PDF

73.8 KB Created: 2021-10-07 17:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 29d3bc32ebad30a9065f76dc88519a11 SHA-1: f764c3ca42857d8d8a552be3737f9760de898bd3 SHA-256: 7590a69c0fb3ea67448ffd5af8d05be420b3b4eac4a1f2cac0004e87542f42b9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to host or redirect to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document for containing a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zulassungsservice4you.de/bilder/file/sitetivegej.pdf In PDF document text
    • http://smolninskayahotel.com/userfiles/file/96893111845.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/jirow.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/fizaxetin.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/50949305728.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a36009eeeb---37652900217.pdfIn PDF document text
    • https://drterrace.com/london-100.com/userfiles/file/rupuwosedemojofazirewese.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/38051360889.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/jutumadenepezujodajote.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/pidujilizupisikuzesutafu.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/9696387877.pdfIn PDF document text
    • http://xn--12cf1djdb6cbcafdbu1f1cudgcc8am4wf7htgd9de.com/ckfinder/images/files/lenejuzesakawikakifi.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161313d8bb053c---80962188083.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/sopugef.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090907505140.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/14939282247.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/7445448129.pdfIn PDF document text
    • http://jonme.net/ckupload/files/34200132271.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/nesufulagomugijivakujoje.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/befifabuwegotolavezu.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/14988905665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+advertising+concept+book+pete+barry+pdfPDF 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_off0000ba10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA10 11228 bytes
SHA-256: 0ecbbb6fd9184ce46438f35fd5c5ab53f0ec48b2f52baf3e8e794621f949c740
font_01_sfnt_off0000d3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EC 17656 bytes
SHA-256: 80dc14291338d2a6bffdd484f3ecbd2044f98b6d4248e9d2488eeabacbf9e84c
font_02_sfnt_off00010190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10190 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1