Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ae93bfa8ea4c8b…

MALICIOUS

PDF

77.8 KB Created: 2021-09-02 09:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 61810cccb98b871719bc12b4dd1d1205 SHA-1: e90f92e09be0615353cb8dc13ad27836c85ba2d3 SHA-256: 93ae93bfa8ea4c8b9022bb2a0f05d3543c717d354307fb903ab0b5de76379769
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://drafthe.ru/uplcv?utm_term=smoking+pre+cooked+brats PDF link annotation
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d2a7df6ea3069b97f9c7ee0072905871/84984960147.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ef1d9b651---zexujadolutilifix.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/dutosiruvaxefomax.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/81275804620.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/folelex.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/belenozunigulatemo.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/jj493f5lkvq8d6e0jgf5rsfqj6/rokipor.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a63acf8bfa8d12a90b81822501987c95/mopejurulolabolojusili.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/1e41d4eca9ed685bdd0ee8c635a94042/radozubobatega.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/padumim.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/4284603135.pdfIn PDF document text
    • http://calliopegoodrich.com/clients/73417/File/kufanopuzelexegoforanadu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/wikubamesimibafiralexuf.pdfIn PDF document text
    • https://parfumzone.ro/files/file/sanitozifakesej.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f388b13703e54a452aedacd1a5fe17b8/95787393980.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/9431619916.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c24e159c5---kigagasalalex.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607435c4b4d2d---wilavarinaze.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/65886754272.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/rutelen.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/75461337703.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/jagijukijipiruv.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c24a0e0e5---18133798278.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/20850387462.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 17172 bytes
SHA-256: 4a52b611bd5ef8d89f885a39f24e6f0030932174ae8175e83d54acf12d40f12f
font_02_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 11120 bytes
SHA-256: 9b719980d2c4f78d4cd2e8829bf4ec2492b0de1e7d9686fd7883b60a2a56d8b5

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