Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd1ee6cb856dfe9…

MALICIOUS

PDF

116.0 KB Created: 2021-07-24 15:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8a5cb15b9af93c26b26a20f519ce27a6 SHA-1: 205645f4c0f8e9d09fa881478129ae3b60a3d77c SHA-256: 8dd1ee6cb856dfe9cd78c41153d5abd5604a3ac3a1b619808a55552bfc040567
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious or phishing content through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://autavrabek.cz/obrazky/file/18746998987.pdf In PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/fedidora.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/70077137093.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cccc9628f4---90225126209.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/piberoribori.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742c88a7756---vijotekibikatipepimabako.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096751fe18b0---pasawurerevipoxexeju.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/kg4qqg8nl7oav7dg98g6cs0g11/wijulival.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/65510078612.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f544492bf3---73097016218.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa75c4589a6---gurekinojexidego.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/6864512191.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/tapatumuxazo.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/gilasijor.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/nndi8hc4tp7as7cusddlth0ptq/vebekizezafinesojizamo.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/15386991139.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/33479479787.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/915db0f82c6bc8811ffe4dcbf5beacbb/zexosulobav.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d2af610d9---4885524540.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/kudezidef.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607510a7ad8f2---meratudo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f434aee5e1---sujol.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/0871029a193f03edce870011d854a231/gagikurixokasigutasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=surah+fatiha+with+urdu+and+english+translation+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012c58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C58 27380 bytes
SHA-256: dea5b70f3ce0aa1c616a5ca7032e5525ccb1461ecce4e4390f1700624f51c029
font_01_sfnt_off00015cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD9 11036 bytes
SHA-256: 865c9dc248655086761d8741f68161203923751f1d0cd12726914aa5490afd7f
font_02_sfnt_off0001764b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1764B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E5D 20756 bytes
SHA-256: d8aba163fcae8b11e567a4d584962641d4c7c65c867024608998d1f9e91c64ad

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