Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ade141561ed816…

MALICIOUS

PDF

86.2 KB Created: 2021-07-15 12:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88f2f75d5ea5bcc938fd7df13b117272 SHA-1: 2512b7171943f096821cd226651535c84a2b53c5 SHA-256: 80ade141561ed816535072f3cab94dce6d1d70a6cabd7718d00844bf36d83243
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a raw IP address in one of the URIs further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://naturallabs.fr/userfiles/file/jasumazekosepa.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/cde2496a79066e9c9979dcf08fd5ef0b/xuvuruzozolaponifanewenax.pdf
    • https://shellserva.nl/docs/Image/file/darulozunomido.pdf
    • https://bocion.com/ckfinder/userfiles/files/87254786390.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bd48484e20a---99473969399.pdf
    • http://esoftland.com/userfiles/file/milivibofoginibazeg.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc056e235---kuvikawelali.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/mspsav81ccai9a27hmk4o32vjs/fasatowawotutuxunifo.pdf
    • http://amctop.com/board_data/editor_img/file/202105191021.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/4e7eabd24ed44e33de5fd31dc1200e6e/25916420492.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0bbe0a28---bixisavi.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/qk1ijele6hl0kdgjj9jh03t2q3/tobofedoviv.pdf
    • http://leguido.net/files/muneroviridapakusujil.pdf
    • http://brenna-ski.pl/userfiles/file/32718758695.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b19b514e97a9bc007251c48386b91ab0/34260548649.pdf
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/injrl55rkkv3a1s76uk2tv7pcp/tigonoxinedarupu.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/jepeduvomekifox.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6bab17bd---91705889643.pdf
    • https://unicon-msk.ru/data/files/pabezewimoveriwus.pdf
    • https://relans-nn.ru/images/docs/file/8895596300.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pins+and+needles+on+right+arm
    • 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_off0000e9a9.bin
fc0fd867d10e9f246058e21d6616904fc274b9b7e3bfb6c7c417f19e5541909d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 19036 bytes
font_01_sfnt_off00011a3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 16792 bytes
font_02_sfnt_off00013251.bin
78be389679c1dd015e8839dec143567d016c71bd7bfc3a53bd9fb4e7be1e237e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13251 10696 bytes