Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2be321e956b26d…

MALICIOUS

PDF

109.1 KB Created: 2021-06-27 06:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3ad533c06575b758e1cf95c07c5eb79a SHA-1: 5f83fdc99b85bb5673a1704788f07d7e1eee27f9 SHA-256: 8f2be321e956b26d74946d55d6bbb70216a5b5dceecbbb03ec8bcbd524501fae
196 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CLICKFIX' heuristic suggests a social engineering attack that instructs the user to press Win+R or paste a command into a terminal, likely to download and execute a secondary payload. The numerous extracted URLs, many pointing to compromised CMS uploads or disposable hosting, further support the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://extracam.es/app/webroot/arxius/file/8614660511.pdf In PDF document text
    • http://bogelaipigeon.com/upload/file/pomapafuwaregevuzovixixa.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ek899enpnlvkufpmpqtlugq681/zuwizexedudedasemixuma.pdfIn PDF document text
    • http://gabortech.com/admin/file/kodibotojojepe.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ea1d45fc7d4990235972b0fc1cba75a7/bekud.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e81092361444d8d81a61414ec395840e/56322603902.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/76d83a432287f7437233089425228372/gaxuxir.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/66660957600.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/6ghvrjle5ttqdk7s5ujtf9msah/xeniruzubadukodutokufovu.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/bea6f401fe5b6bb0f2852e917d7ac286/funodalexobewowukifugosa.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ae405958faf---54534851500.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lagl470h33mvmmspj5fduvcn9q/43059103018.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e06a50bd5---67918411489.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/59jeblodk34965nnnnl7lfvod5/vikudovok.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/rrcgo492tarb11okmablnl163n/81367348523.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/86718682055.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c36e1e4837f---banowima.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/95463437410.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06d25a65de---vojivupo.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a027cd8f2e4---rixofolavaniwowikowuvan.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884df37a41e---vovaxizewividukejox.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/kanedezasumobosafojotupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+make+enchanted+golden+applePDF 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_off00012a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A10 18764 bytes
SHA-256: 84e5041ac4f135e6e0f59c82ad52a3edd569e2c7f1aa2aaecee6d69c5d8c81c2
font_01_sfnt_off00015b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B55 10768 bytes
SHA-256: 0386c6a42579d0f8299766bf65fc07b6251d494c7f7b60d7bdb02c371126e7fa
font_02_sfnt_off000173b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BCA 17148 bytes
SHA-256: 69491bb7f974397d9233953fa3840df5d52f4eca3761b01562fb556f69bcc76e

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