Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a913bf7186996a…

MALICIOUS

PDF

90.2 KB Created: 2021-09-15 12:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 55f542d46ab04fc478e4b3492e5db59c SHA-1: 0415955787745850cf5b30c23a35d0036add53f5 SHA-256: 45a913bf7186996a35f84c7f8f8bfea2aa76a3ea185d3a350d01804907801c89
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. It contains numerous external URIs, including one that appears to be a link farm, suggesting it is used to redirect users to potentially harmful websites. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://pixomot.ru/uplcv?utm_term=resident+alien+watch+online+free PDF link annotation
    • https://kiofruits.com/admin/uploads/files/903911789.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/neniz.pdfIn PDF document text
    • http://timebymtm.com/upload/files/loserikojev.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/xorudejipegejexu.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/memetowerudulanaviruta.pdfIn PDF document text
    • https://menu2uplus.com/images/file/xegavofarimewosonosolujap.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/90010100202.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/kujobasomiwik.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/movakedolosed.pdfIn PDF document text
    • http://1careglobal.com/upload/files/44493235680.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/96720859460.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/dijisakoguzip.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161368f2bb729f---rudaxetigerupotalutub.pdfIn PDF document text
    • http://lukinserv.hu/file/tudiduxiwetevuwujozekuj.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/pivetupokimaxo.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/jamenuniduwa.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/danulamagemijo.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/nojofifoxapexenoromun.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/gakerazopikijotukoga.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/lafipusasolenesoridapa.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/70825849463.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/6100457566.pdfIn PDF document text
    • 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_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 10704 bytes
SHA-256: dd4ab6c83df09bc6b526108deda98ebdb9499ff8a8c4b8c48f7336abc3fdb724
font_01_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAD 18452 bytes
SHA-256: fd21ba9ca70d37beba920680a4a4033fac39a30311c6cc05df200f3ac3871878

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