Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e55b5097b04afb…

MALICIOUS

PDF

85.2 KB Created: 2021-07-21 17:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8aeddc66611f5dd321d2878cc43dd4f SHA-1: 4fc8380c4a0a70d984eae064cc48a42d8feb5b93 SHA-256: 32e55b5097b04afbc202fba4d1186e93553499d527bcbba577462530fcc4a073
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of raw IP addresses in some URIs further indicates a low-effort, potentially phishing-related distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://jtylek.pl/Upload/file/megujixevirifet.pdf
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/80447784773.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/l34s0ivo2qk50veis52e99se37/rorozirenusanatutigelod.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160829f9818501---29751850116.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/lunlrroh617er02rd4cf46edtj/75445138812.pdf
    • http://stl-hk.net/userfiles/wolevaxosiwamusunevojomo.pdf
    • http://www.radanhorse.com/resource/files/rutepupawemulomerukedor.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9d6a65a07---64360233788.pdf
    • http://varanini.pl/userfiles/file/1141312602.pdf
    • http://intersonik.eu/upload/files/jiberazuzajazuti.pdf
    • http://tradeweb.es/userfiles/file/29927099581.pdf
    • http://gsprojekt.eu/userfiles/files/makizudixeputed.pdf
    • http://howsonfamilyreunion.com/clients/5/57/57b8fe7d350e782a16e6afc8bdcd6467/File/25155318588.pdf
    • https://grandplaza.bg/uploads/assets/file/66736772737.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f2321cfa0---mimuviwuvaba.pdf
    • http://camwater.org/media/files/22841552760.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cff20ddd04d---minusasoxepedixuteba.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/setabum.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/o54fi950sa2p3sn7smhqas4945/58684188965.pdf
    • https://hoavily.com/uploads/files/29782783096.pdf
    • http://ubest.ru/images/file/pojipavojoworuw.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/486f7cdccdc18c84e111dfea00e3c629/74336523341.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6e13b8e73---xiridutilebuwa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=now+care+near+me
    • 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_off0000ecb4.bin
fc14b95b466747d78cb90ac58096680be7bdd3d2884ed71d0a1aaabb14eb208e
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 16720 bytes
font_01_sfnt_off0001185b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 16792 bytes
font_02_sfnt_off00013072.bin
98ac7dba0ded2813fa8d4e158fb57806c4bcdeddba37b79f199d9ea08e4eab5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 10048 bytes