Malicious PDF — malware analysis report

Static analysis result for SHA-256 476c0260573a5bae…

MALICIOUS

PDF

68.6 KB Created: 2021-09-18 03:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fa6f5e3900c7545900925e6a203a0ee1 SHA-1: 93a4142fe644e1fb11134994b103bb6d3185f485 SHA-256: 476c0260573a5baea4f122e8a86ddb41abd186067f7283f60371d13bd3394ceb
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 embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The presence of these URLs suggests the PDF is likely a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://archism.ru/uplcv?utm_term=how+to+download+java+for+android+phone PDF link annotation
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/25584910410.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/27131973920.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/40901524692.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/59905215633.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210905182926_396866321.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a721703bc8---vopepukesulafofuvatagiwut.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/613df285991ee.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210911011851.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/17152117590.pdfIn PDF document text
    • http://bwc.lt/i/16763016868.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/48564097721.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/48919364361.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/zilagipufegib.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/84882434417.pdfIn PDF document text
    • http://chenruichem.com/upload/files/ponajimapujitenadil.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/kulatiwexexivanelupif.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/nuwatenedozega.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/31738953234.pdfIn PDF document text
    • https://computerzone.pk/file/xezerafifenugasama.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc697b6d0d---25773989627.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/gudemikipinigedaten.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/tipezebukigid.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/87425522360.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/disali.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/53944558066.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_off0000b0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F9 10700 bytes
SHA-256: 0797183b7593236a63c4144f6fd9c794a391880a50504c5e15c91e0b37b520f4
font_01_sfnt_off0000c966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC966 14212 bytes
SHA-256: d3b7904945667c0af668ce1026e542fca173539b1463a2a644cda5afcad089f1
font_02_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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