Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d6cd15e5260052…

MALICIOUS

PDF

85.4 KB Created: 2021-07-03 02:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 40cc23b832d50d0f2e6cc96ae38a59c3 SHA-1: 0dcf7b85fc32d93010ff4a11c57d946d4a157a5a SHA-256: 95d6cd15e52600520cd3fa7fe0818388e002f91e555bde39584d052c0eedab4b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload directories, likely intended to host and distribute further malicious content. The presence of external URIs and a link farm suggests an attempt to redirect users to malicious sites, potentially for downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/mozilolevorevifosu.pdf In PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b30b71a36e453e8d98c1a1337de4b641/74239169490.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/46uh7i1l0fsdc81gjvrnpksnue/jubofonatuvaposisid.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/97140128674.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06ea954375---97543545280.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/61288950394.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/sakajuzaxazomoweno.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607adf4cc6a21---niripuwewurexafoxeb.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/69ae8bd0e8e111ed3003f662aab2d728/99016900552.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a7d527aba---gejataxigiv.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaaaaa86d5---xobumizukokenuvuwu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dbtfshuk3aih8ls8tn8okkvf73/zetobem.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/zirukupawapezidegunafajog.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/gipapoweboduj.pdfIn PDF document text
    • http://euro-ex.net/images/blog//file/tabiwanobapupezapup.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cfb5ec859---dobigajegebo.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/83691781213.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eebde402c---madaxofobofevaro.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/81269274529.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aac1ae247---18188743871.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/lezinibogadutiz.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/24270996492.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/18023126384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=payee+endorsement+required+meaningPDF 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_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 16844 bytes
SHA-256: b30092806baf294a56a828a80e1f67f407408882d556247714eeb7f8123acf4c
font_02_sfnt_off00012f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F70 10904 bytes
SHA-256: 18c23c65ee68e7e0221f0aa3067d1b53fbb12b55b0aa541652c8aea3e03811c0