Malicious PDF — malware analysis report

Static analysis result for SHA-256 62353f5daffe4015…

MALICIOUS

PDF

154.7 KB Created: 2021-06-26 04:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5f1985ae36e454fa87f0fa36cae6688a SHA-1: 1b1e293893ea6cba56db664e9cc9817f443f5479 SHA-256: 62353f5daffe40157cb16f3e1877da80a4f3ca62f8864ad748e07881813b2c01
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a likely attempt to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9254153e07---55025143423.pdf In PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc19f8a6ed---47623236622.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd05479504---zusikumogabexajusinam.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098fe5f83364---lizazeza.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/e8744db9cc58f3a4f16481ab33692d02/jorasawugajizakejosorazi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee021ea682---gitupezatagasozepa.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/auopplhvqa1vj33rfg7np92nb0/gidem.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/50359591507.pdfIn PDF document text
    • https://avela.md/userfiles/file/17308485597.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/wezat.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/bopedimudadipel.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/17086780773.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cc1d95c75---73453278172.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/befegedanigegawoxiwi.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/f246c7d98f70147b83e9e52cc23cc37c/98970460347.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf10485f63---34079741430.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/13283511467.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2777d3f29b---xasejugimetonisisisivaz.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/gibedurijinezuxabidiv.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072e659cb26e---42137880491.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/r8u7h0v9f93civ62ds9hg8t9ru/namaroweporasomib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c489456c1---95937238904.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/03172233aa8c4a25226ac6f64f4633e0/wutuvigitamazerar.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/7ff63b6dba9d645840d7b9de4e7a818d/fofotagej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+little+prince+death+quotesPDF 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
font_00_sfnt_off0001dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEC0 22104 bytes
SHA-256: 43a1ce9b2cdaf2f2644e285460ba9de49380eb071f4cb3af4ddacd4cf43338a0
font_01_sfnt_off000214b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214B4 16100 bytes
SHA-256: cd995502891255dfbcf4afd28e083ab8bfc87dc57603266f4586087dd25ac3fe
font_02_sfnt_off00022a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00024223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24223 10820 bytes
SHA-256: 722aad2761c3388104e9a2fd491fc75512f4a88436c95613471d9e4bb8af36ed

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