Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7af508d8bfb631c…

MALICIOUS

PDF

89.9 KB Created: 2021-07-23 01:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14106b546c66dd7cf79344c6e78cb858 SHA-1: 73105870e2ecc2f3cc56de7a048dcd72d429cbcf SHA-256: f7af508d8bfb631cf9f4ea5c96af1c33df7fd6116bae9673af5d2664b45f8b0e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites hosted on compromised CMS uploads and disposable hosting. These links are likely intended to lure users into clicking them, potentially leading to phishing sites or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://bestbuyfromindia.com/userfiles/file/kejatezolenegonisaribi.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/8b5729938c10f6c3dadd6b40ae813465/jaxitonifazanuletu.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16098efcf8571a---rumisaravaxir.pdf
    • http://mqskin.com/luutru/files/27625102542.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0f773316f---81648371240.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/76a65b8df5e452b771331a2d854a45b2/wixopijuwamogujad.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847fb651769---gozixukom.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160af3f8a71389---pujovazaxojonujudezepi.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/dedovigumikibogokovoxe.pdf
    • http://allasclub.com/campannas/file/xivifotasokabevakebij.pdf
    • http://mnogonomerov.ru/uploads/file/45339330778.pdf
    • http://penzionriverside.cz/files/file/ropojeponapisobewonune.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0c90247da---26257522814.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/sheh9m29k0mluats0vu0emvak6/65979657491.pdf
    • http://phonphangschool.com/upload/files/nerubixosuzenepoziloso.pdf
    • https://allcreaturesinc.com/files/files/5041836369.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/32857373975.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57572586fe---68004117037.pdf
    • https://goodline.by/userfiles/file/44665798119.pdf
    • http://sportgalaktik.sk/userfiles/file/92917362194.pdf
    • http://nebo52.ru/uploads/files/77964023228.pdf
    • https://picinterior.com/ckfinder/userfiles/files/suxoxiwazutaxewibajuwatow.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/rolab.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c2ed90171---nosuxomupinoxo.pdf
    • http://geometrarontani.it/userfiles/files/tapaxegamejamamusuzosol.pdf
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/nuwufusiw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=signs+of+photophobia
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd0e.bin
eae861e3e38ebc72465d556ac6e6deaf8b655adc927db355520172402983ac06
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 10576 bytes
font_01_sfnt_off000114db.bin
d1ebbccbe5cc5fd3185b6bc49979620119e5bc6ab6c40bbfed7250d2dad3d353
pdf-font-stream PDF embedded font (sfnt) at offset 0x114DB 17236 bytes
font_02_sfnt_off00014190.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14190 16792 bytes