Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee47ad8b184cf13…

MALICIOUS

PDF

81.9 KB Created: 2021-06-30 09:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b29a14e4b53b1f76354c5bcd05a7526d SHA-1: c7ab36fc471a30a354f599a5402cce402df54b3e SHA-256: 5ee47ad8b184cf134ebaf577ad7a9e07fd22cbabad6309a5f0cea968163e1d1c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. No scripts were extracted, but the structure and URL analysis are sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://reicar.dk/userfiles/file/rodewele.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/24cb180feb219115ad500f7b1cf3f717/jirenawojakebujev.pdf
    • https://okna-stv.ru/userfiles/files/zewev.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a9273b36e8c---bujopubemogeme.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b299b84c1e4---fujivulofogira.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/v8q8iiib5bhojqff2t271k2cpc/dabagomol.pdf
    • https://kurtoglumob.com/upload/file/26218766347.pdf
    • http://falegnameriacastiglione.it/userfiles/files/xulamob.pdf
    • https://alianzatours.com/imagenes/file/bufeguzimelozu.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54ebe5441---33191801851.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c2c2aqram81rsf2q2ql9qcil6/tuwejujezujokiwigufi.pdf
    • http://ohappy.org/userData/board/file/47293809892.pdf
    • http://ohappy.org/userData/board/file/18330016408.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/9a6814c49a28848f093fe1c6d0a71c5a/mejufifotakekomadifajalo.pdf
    • http://kidsjeodo.com/images/files/50913382093.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfbf948856---5408494099.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/subolunesotofatitolela.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/019a9317eb7876efe536e8bda0a4d3de/16230583793.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7976e39c9---40506614507.pdf
    • http://maasmartcity.com/userfiles/file/dujilu.pdf
    • http://energo-winstal.pl/userfiles/file/sikiporogepulemevane.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0e41a83f---kilerosiv.pdf
    • https://nic-irq.com/userfiles/files/80258886559.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/icd2q7idjkh4u5scbd3gfdkbn1/tusetezanuxidozugekafinem.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tubidy+mp3+player+music+download
    • 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_off0000dc5c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 16792 bytes
font_01_sfnt_off0000f473.bin
155af6cbf203380ed4f2c9117e5272bd885243f319b358a3313f097359309b7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 11152 bytes
font_02_sfnt_off00010e4f.bin
4e11d9f4f4406be1990ad773cf43a4ab5cf2b7cdbf45fe7bff6e3858d1683ccb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4F 16872 bytes