Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1382ba8c6d5ed03…

MALICIOUS

PDF

84.2 KB Created: 2021-07-14 03:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7617f3c7e09136b35d8fb11d6e1bca75 SHA-1: 1c7fcbece7888228415b485900cb2551666d61a6 SHA-256: a1382ba8c6d5ed033ec2d7b6590f7552740d8f59e7539424fd7d565f1a1cde63
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://fzcce.com/aimgs/uload/files/89354225608.pdf
    • http://bamila.vn/luutru/files/wijerewexi.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160968c1a3fc1a---wakibati.pdf
    • http://fashioneducation.ru/userfiles/file/dumokavuzumixafupuvemi.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7df577eeef---wirigoxajasiwof.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160942918b1701---gexowime.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/ed7486e339e7ceeeef15e10920bc1c9e/barigot.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/0a27ee6627a92cc486e347e5d86d0c07/77109594553.pdf
    • http://iamsong.vn/uploads/files/14340974045.pdf
    • http://17njl.com/userfiles/files/mufawavatalusaregomevepo.pdf
    • https://canevastoilestjean.com/upload/editor/file/tazupedusamaborijufu.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/df2ettr81d8ql8hvdl3ci03h63/94284591459.pdf
    • http://griby.biz/ckfinder/userfiles/files/bademotujiniwikevif.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b747599ccf0c066134a7502d232ab7e9/salokox.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff68432781---93039098864.pdf
    • https://tradingphrases.com/userfiles/files/dosedavijazutesolatuzut.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7ce2msov57j54ve8baogt3gbgf/tuwexagupevu.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/cd2105c83f29b90e611f630542d68150/94242088763.pdf
    • http://montgomery71.com/clients/34132/File/19715318491.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a7c0765a---42215318816.pdf
    • https://poolpoint.be/uploads/file/44155441402.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad8bc52a8---kifigerigawapolog.pdf
    • http://hainescentreasia.com/images/file/16797103161.pdf
    • http://travelshops.pl/userfiles/file/33295582409.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=assuming+office+meaning
    • 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_off0000e646.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 16792 bytes
font_01_sfnt_off0000fe58.bin
5a5dce75abf95b09db5ba47cc628994a155b9b1b8d212865f8956e3de1fb7e66
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 17420 bytes
font_02_sfnt_off00012bb6.bin
24a63a15cf4b75f04f40df620d93d23a81c81041672be5e1d2ffaba92c7dd495
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB6 10516 bytes