Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef06019d9b03ab7…

MALICIOUS

PDF

257.2 KB Created: 2021-06-29 16:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1484b0437967ae646cf237ac803a38d6 SHA-1: e5b5412014de0fd49ee35b90ad63a4391bf2baba SHA-256: 0ef06019d9b03ab75957d624c1d1515d387fc5b69959fdfb9a2294bd2249c8fd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage and SEO redirectors, indicating a phishing lure for free downloads. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://adaviestransportltd.com/userfiles/file/zujomaxunaranafagume.pdf In PDF document text
    • http://archi1919.com/smlclub-files/file/23390660195.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/91338107703.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/virifenado.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a37ab2afde0---51730517563.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/2as1v6n0dodo40tk8hvdd8oee6/37384781195.pdfIn PDF document text
    • http://wenxuezj.com/images/File/bojebodivid.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0a3994540---38731081990.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/78569697028.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/15985475049.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608552f57a430---55142653314.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8661e87b---38823212163.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/lokituvulu.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/g6fedfeedc38pkvv7fmcigru2j/89683707681.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/wetotesolato.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/21696522144.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/59398048750.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/jupovovuxokujon.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5904b8545801d0a5ad31b29c6ed34377/dulipirowotef.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/biduzun.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7d0126097---33829476597.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/2490bdda8722d4a9384f82726640139d/96484415374.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c896b744cf---89601479371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sql+today+minus+1+dayPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36AFE 10664 bytes
SHA-256: 78de21bdf8528aa21af921b0e66db3e01ae6ae73aaff544a016ec451ae57f5ee
font_01_sfnt_off0003833f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3833F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00039b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39B4D 11436 bytes
SHA-256: abeb6cad75b3bca05313bc7c5627d93b3aec8212ccc106724c4b203fc6aad77c
font_03_sfnt_off0003c0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C0CE 19752 bytes
SHA-256: e7651ccfc18f682b3bb097324b88d3612ed92fc32c35b6e488f732025d5cb667