Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b60b2c6746a3506…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 06:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6cdd3b40ed385d42d2efd724bb2243cf SHA-1: 17e1031bb0c7ee74d2c74f5b20a2b7d39d85657d SHA-256: 6b60b2c6746a3506aed1ad027136ec68db0b49bfba3b73d31dd296ae51bd2a7f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to external resources. Several of these URLs are hosted on compromised WordPress sites, suggesting a tactic to leverage potentially trusted domains for malicious distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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://igorodstore.ru/files/userfiles/files/gazikalifesuposesipam.pdf In PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9a70665ff---jagikojisigopuzubavaweg.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a89f040c0---busapilavodigiji.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/14a4a965616dfad631900f558ded3834/3010000760.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fcab02652---84477906430.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/gabusofegimoj.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a446b70e93c---talarofejuwufakubufodexun.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/7f3b108a0cdb16529eb8e66d97aea109/numedudinawarumimo.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/xoxalilutikezi.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/lfqpm7auovhkfnsanrlp2j6lfv/gujetisugarerokonusizi.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/4u87vugh1jv8k2idm9pl4g4thg/zajibutazi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/s8eqfk94se418bv33hmjpsmgu4/84045070899.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/dm5hr6gkhgja5mvr9a2f6pb7vb/tujukekumelega.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160759267dc48e---86518980418.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c857ce9eb96---46527672779.pdfIn PDF document text
    • https://noddy.nu/images/file/xusuvevijosimiz.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/72409c35adb26c0ee45acf2c4aad505a/beviguliligawedopewogij.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/nmbs78g2sgnlbu4v40aifcqgnk/26051355707.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/woforikovadidozegevibonek.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pqof2o8dlhloc9ke8bf4ee31j4/50671749939.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5582a15c3e6b88144a2abe9664ef86b7/zabeni.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/supeloganokesategifok.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/csnd1ssjai9d5c4bpvcv4e7886/89581531769.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/9a7b6d42a01642187b94b7236e45a611/38389569760.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2041b76766---2671305892.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/sevese.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=jekyll+and+mr+hyde+pdfPDF 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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 19952 bytes
SHA-256: d4a1445d6c0f59fc1a5c99fed0b7eb0580b140247a790c45e5bb71824cd0f5be
font_01_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AD 10480 bytes
SHA-256: 2bb3dd60c39e44a58ab16508570cc4dcb1c7edb66de1af4768c214b67b47daa8

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