Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d47272da4a399a…

MALICIOUS

PDF

90.9 KB Created: 2021-07-03 08:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d34ed4305a9510fe75655c209de2dd74 SHA-1: 2fe934a1b19b477b2ce8482a1a4bed1f501e2c54 SHA-256: c5d47272da4a399aa02db423acda6f38c970a1fd03a785ca488c7bdf770f5c02
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://szwygs.com/upload/59352288236.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/4a9d13299af15ce255ba431fd2cfbe4d/89561114091.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a00e8be49975a13af322636564acece2/pofepepopebi.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/7kqbv4sgi1ful4lb00vf3pokl3/zowadu.pdf
    • http://wsm.hk/images/uploadfiles/file/gabamutowipiteralegaroluf.pdf
    • https://ludifrance.fr/userfiles/file/zatukima.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/8bd553c884ff416301572d6ced8c6c26/67598317325.pdf
    • http://alnoorcity.com/userfiles/file/41882207154.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607002d08b781---podapesisimozir.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/10556120281.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a213c2dcccd---41639242184.pdf
    • http://litho-and-co.fr/ckeditor/upload/files/ginisesegugu.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/mi44cagi94m5krbsp70sj4o4nh/fodisobepivufinarodoke.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/420637d8eb8ceb039d38aa0934bc3b62/47080534484.pdf
    • http://yejida.com/userfiles/file/91680215905.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/j73jbokqi1ojtbpu52uilgogl1/fipiwe.pdf
    • https://hostingalani.com/calisma2/files/uploads/fuzariwazujezopezizaxexo.pdf
    • http://meadescafe.com/userfiles/file/18200419256.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761184ce5f5---zabilutoxuzepipigaku.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a10b2bf66---51484486894.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/d766f3a92f975a003fd8e11df08611ee/xemagavorixamavalulilu.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c49f07384---zirewupatepabipofo.pdf
    • https://tepihtrava.rs//files/duxiravagudujakalunu.pdf
    • http://mini-garden.ru/userfiles/file/zofexanuwiri.pdf
    • http://geyikkimya.com/userfiles/upload/file/41573528119.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=read+the+bible+in+a+year+plan+kjv
    • 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_off0001012e.bin
9b55b25d6189e3e45dcdfabc4a5b1c6b4a2c92857c4c723e9c7ac730cec3d676
pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 10788 bytes
font_01_sfnt_off000119a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119A6 16792 bytes
font_02_sfnt_off000131b8.bin
1df7e6e1f4c54f4490390f4ef43c26808d7ca59afe5b65f8c4ba64e63511ea20
pdf-font-stream PDF embedded font (sfnt) at offset 0x131B8 17064 bytes