Malicious PDF — malware analysis report

Static analysis result for SHA-256 366b0e7d364bf650…

MALICIOUS

PDF

86.3 KB Created: 2021-06-29 20:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 854504da00cabc6899876e029d893a42 SHA-1: 8b6c4cb07390e492a70bc159dba8bb49e1dab301 SHA-256: 366b0e7d364bf650abaedfc7b0f7ce23a50eb6e95cb370829f6268889f22facc
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://asfalon.com/__files/file/burirojivudexunuwidufad.pdf In PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/ec6d4352e5b38fe0fe7392b8d2c5028a/1752358609.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/xuvafa.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e5d9de28f---15428733685.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/18692540288.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afe1732ddf9---zisimi.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d4444e7d---kesovixowefajape.pdfIn PDF document text
    • https://7gking.tw/upload/files/bemovabivosidudoku.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/9iv7l2mjcegc46q9khcqn53ioo/28876628697.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/80793150688.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084467a0af6e---xekafokel.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/b4b5a7694baa3e594d4d0179535f0e7e/39925921579.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c929ade7a---damubagafagerada.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/27710657299.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/3d17f0fe396fab5e537cc30b4f0dec56/wikevag.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/zitojedowu.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7df743031---faturezinonege.pdfIn PDF document text
    • http://prosquash.by/data/molusezokefemotil.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/xapapanejaper.pdfIn PDF document text
    • http://beta-rc.com/upload/files/zaraterilofeguvunagunope.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/86214136b70a02fd79416c73823e8c79/58591066360.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607682819828d---dumive.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/taxuruz.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///vufafejogana.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/nolasag.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc1f5bf0bb---41695142930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=perfect+timing+bar+and+grillPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 17920 bytes
SHA-256: 34df7b26d18ca0ce2b40c84a3b344caf46e00958d5320cbb3b62353836deb3f7
font_01_sfnt_off000119d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D1 10672 bytes
SHA-256: 8b83c842d1f63dd3bde19e6fcffe165505e2fc519f44009755e2c2378d0010b9
font_02_sfnt_off0001320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1