Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67e7b0ab2dadc8d…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 04:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9b25fe4789f060e3ba6163ef06f7514e SHA-1: 0059a3be07b6da62f4c8f2cc8d9683ba89bb4925 SHA-256: a67e7b0ab2dadc8d0937774b90c218983faf554fdde9c9805321429c98e2dedd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to WordPress sites utilizing the formcraft plugin, suggesting a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070db3de3af0---gafupolal.pdf In PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b754d634abf---81921953225.pdfIn PDF document text
    • http://stroi-sistema.ru/img/48008361089.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1db24f995---kurobumufutijibegu.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/zawepuka.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/54289378088.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/xodijepisageg.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/18480345287.pdfIn PDF document text
    • http://tid.vn/upload/files/zomorasinu.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/21148408225.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/gawesiwexezowemezafuta.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43cef81b63---timirekusiderebub.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16111a3d8da66f---77928656577.pdfIn PDF document text
    • http://parfumland.sk/upl/novepoxekixudaretorol.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/98398567131.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c55f774b6---vemijomolejodoladimi.pdfIn PDF document text
    • https://senhewood.com/d/files/xuvegobigubajulemodejaf.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/rarapipolezuwiw.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a7182523b2e076ed737215d7d71ef52b/mukokoponubot.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/gosiwip.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161294d4b5846d---wugirugukasojuxapuzutizax.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/e03646bc1dc26f863f884895e7bc1529/ladupuvapopine.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/rajojewotivulosim.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/33471774652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cod+warzone+ps4+connection+failedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 10868 bytes
SHA-256: 36897632ba4c0b4d6cccd09d29a804b6f0ea9b8802dac2f7acf3058d6af22ae9
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11860 18220 bytes
SHA-256: 2af95c2188b939970e32069923c5898931d149a566cef5cef3fc7024c590d39b

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