Malicious PDF — malware analysis report

Static analysis result for SHA-256 485de38f772f6191…

MALICIOUS

PDF

89.8 KB Created: 2021-07-02 10:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7f5daca70627087e45410f82792eeaba SHA-1: e0b33906472999754ca35ef3e0995126371f8cf9 SHA-256: 485de38f772f61916a533e40a62399c7d43b36fc9ac8546f06a74a41102bc2a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous links to compromised WordPress sites and a deceptive download button suggests a phishing or malware distribution scheme. The file likely serves as a lure to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=how+to+break+your+water+with+your+finger PDF link annotation
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c5f4d7987---wufomadigenitemalogowis.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/81141024941.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5789ac1cdd---95821839407.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753be55608c---9641941211.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/50652004987.pdfIn PDF document text
    • https://ka-base.no/images_content/file/rubaselemitareka.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c77350c842---13401603054.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/tagujokobes.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/noxinirezote.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/55bb2e2bd4d2adfbb83b2019540a21d4/kurozesegozonalolonetaluv.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160749e464aaad---78974867800.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/bukinuvuzireviwor.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077e64e42b2d---nilunavebosewuluwupegele.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/lojoxo.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/9869969ca8f76a08d1cfb8b5c624393f/17258591384.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/ba768279114b5f4bb6a5677995e0cda7/67920354467.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aba7da5fff2---pezololowoxad.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/80015999127.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210612_141313_8633.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/12d045b03c8f68464b96c5ea8a89c1b4/67570142060.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/nosij.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/392aog71vebcv7fp0vv34kvrcu/towefame.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/52185685ead166156c05439ee34562e6/13452062105.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/0e1j0o774een0gu9llvo8b9j92/domolabasu.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/5b1dc940122bc8cb323d6184176b098a/vodizenasixon.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/fc1c9deb1e862ab92e34430859ebd32b/95366587907.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_off0000fa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11260 10804 bytes
SHA-256: 5e6a65ff4312f8c7cf5dad7075a25bceea3a7f9b64e8fbba1d378bfef8ae3b6f
font_02_sfnt_off00012b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B43 17064 bytes
SHA-256: 64980fd93137f7b45d5a3f0cf8d6f5b1e5f12d89c264be9d217d332d1fa6cf42

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