Malicious PDF — malware analysis report

Static analysis result for SHA-256 609f322e12107253…

MALICIOUS

PDF

87.6 KB Created: 2021-07-21 11:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57be694480f8a894b5b68f35318731d5 SHA-1: affbb978c49f3101682e8130506989c86d8b3474 SHA-256: 609f322e12107253a3a5b89ba51eb12b5812c60a72668d3412ffda2bc57afeb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://holocaustresearch.pl/nowy/photo/file/74223552881.pdf
    • http://kapsalonvogue.nl/files/file/sibetowulojomuwesunew.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/bobelexitisufapodasatabiv.pdf
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/27997488147.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b28611617---53038325259.pdf
    • http://www.toptehnik.si/images/raxiropemizepaf.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f3c7b234e684ee16d98a3a29fc10e0da/60728161829.pdf
    • https://a2designbg.com/userfiles/file/99967265953.pdf
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/96121825885.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608703e9c0470---18380815965.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8aefccbad---vonikuxewefevelanufiwevor.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/l4rmlrhsqs2fvikg1c6g0bq28n/7858357345.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080890cb6066---16689777401.pdf
    • http://bularz-auto.pl/images/userfiles/file/soruzoguramuxorotadok.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b560a2d958d---fidofirijaj.pdf
    • https://majorsagilekvaros.hu/uploads/file/2758234937.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085b97b7f96d---lemaxerupijedutobeduxa.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922cc313260---80030121703.pdf
    • https://bangvetthuong.com/luutru/files/55961028325.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/093542bc314a722f2042873ee3e8bfa1/93536509451.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a95b1755174f3dcdeb00b17eaa667137/kirumidaxijoxe.pdf
    • https://tsegypt.com/file/rulud.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/742q9oh7r74ksf38g3npbop5ks/kigexidanotugavu.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/22124ebba795b4768fff0da0a173a1af/kubiworulorogatije.pdf
    • http://secohthailand.com/file_media/file_image/file/nozojonujododoribinera.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b82c336c975---xufuwiwelilitola.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=swollen+face+and+nose
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f585.bin
4e1e63e0969e81a5ced7bce467e76d83ec1c465fd0f0870425b683479bd79b82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 16840 bytes
font_01_sfnt_off00012176.bin
2cc73456dcff7d81da227e0cbb7e8a27bf148c9bed3ef88784994d7c07786228
pdf-font-stream PDF embedded font (sfnt) at offset 0x12176 10340 bytes
font_02_sfnt_off00013900.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13900 16792 bytes