Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eae9d836b3847ba…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 00:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98486219a33c4e86198328de87dcaf1e SHA-1: b06cdbc91505bd7db5fa8c8147378618e35ff313 SHA-256: 2eae9d836b3847ba74f6adf33d0b7a87760fbd793f9fa9127a7ec0e6350130df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to numerous compromised websites, many of which host other PDFs. This suggests a campaign to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://manajrgvaaradhi.com/cms-uploads/files/basopuvofefagemam.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/23676700546.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093deeb9ee3c---rolisavulivejilepima.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/9b3014940f29c60ca14b2273e0b1807c/xikekixijuvokagoriw.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f3c0a61ed186de57238a66ab8a6f8ca9/fizikogevet.pdf
    • http://dailymaydemtien.com/userfiles/files/nisuwutosusawetagu.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/27bfedc15dc1e7a39d530c2b8d044faa/kajofifa.pdf
    • https://shipnhanh247.vn/asset/files/getolulewakakimodijago.pdf
    • https://actorconseil.com/files/file/nemuzewavojewekuworavovuk.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/1df42c22ba84b4734e8e45f8d6bd07d0/10302526526.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16078607a56691---28869481141.pdf
    • http://kozszemle.hu/uploads/files/libowuxaven.pdf
    • https://reitinguok.lt/userfiles/file/9131264209.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/3t62jbbn47q22p5vholhjn2m77/8132067641.pdf
    • http://alphasigmaoverseas.com/userfiles/file/wadidonag.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081af6db06d9---58684889258.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4ccced1ab---kupevidiw.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a450da1fac3---giwufidiv.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a05e442da---xowexenisagovizelu.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c85bbe3651---59373737402.pdf
    • http://hasyo.net/files/file/50411789505.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/aa5c11d04a92e49d114b55914da94cb0/28181123403.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=for+a+reason+for+a+season+for+a+lifetime
    • 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_off0000ef11.bin
c59a682e0004e77c949499768e931a216723c020b5f97136caa4cf5dfdf6ecb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 10352 bytes
font_01_sfnt_off00010660.bin
0a56ca42a04c6c583cd552f7ce566a0ddf5f8d9ccbdee2285bb817cc44e2fe11
pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 16740 bytes
font_02_sfnt_off000131c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131C6 16792 bytes