Malicious PDF — malware analysis report

Static analysis result for SHA-256 74069b0c7e658ef0…

MALICIOUS

PDF

106.4 KB Created: 2021-07-01 13:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d07e6e638945ef9ac0008f2f37202273 SHA-1: a3320c3def9ed18334c46a75249907e7c687ec75 SHA-256: 74069b0c7e658ef04c7a88284f2480d44022b0b96c9974a8a78e11df33b74c0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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 https://chcial.ru/uplcv?utm_term=paragraph+writing+topics+for+class+8 PDF link annotation
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/9d68de15993d3398543d7b69e58bf060/voluxin.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d8f490efd---40128761620.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b4e326b2e---vunorakogeponixafapuverim.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/remolodixoxojibodixojude.pdfIn PDF document text
    • http://landbondcorten.com/attachment/file/7672e19165912790a33ccd7eeec790a4.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/83294461916.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/3741c702f57e20c60d2b4fff8f504aa7/47901521.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/fiwanisotonule.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/36194441946.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ad7b57d62460800aba52ec00c28da9d1/jefokejumo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/350acc859a503b07819dbf5b51c179ea/48935516819.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/fa1919085a2acdc9a9e3eada489cb2b0/18994020440.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c18eead207e6b633601edeae238458f1/wusadasafumoxemozobowu.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/voketuj.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aab9b379493---90300286467.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/gtr0gqsuiiiguhrqemnagurik0/fujizeme.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/4c1b28864d285984b7dd182984404897/ninakuxivosojusot.pdfIn PDF document text
    • http://matras-devison.com/upload/file/42666494449.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/hh9smguej5h7aimp19e5ajnrl5/73684549034.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a437095b15---28887802065.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/98364ca2554ecb57de599651072055c4/20936049420.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/8f3c6f1d44c8643380350a49df300681/pupemape.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/fowusef.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db75b651455---45196588243.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/ee038d79d68f1d0b5538d661fb9552e3/81755900084.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001278a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278A 16336 bytes
SHA-256: 0ba07f6d54a4cb2ae74247f97c6a926e6d6308299df35fe3bea2e399aa3885da
font_01_sfnt_off00013dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBF 17184 bytes
SHA-256: 65a883b107bb197f770105501cfd211b91af2f8e345125ba6e23a2461ff36be0
font_02_sfnt_off000169f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F8 10924 bytes
SHA-256: 8cd4475f8e491564e6871a3473109999722b1ff0ccaf390f55d94983232954b1
font_03_sfnt_off00018349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18349 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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