Malicious PDF — malware analysis report

Static analysis result for SHA-256 742e1d4ed048dec8…

MALICIOUS

PDF

84.3 KB Created: 2021-06-28 23:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7e1bd86a189b62b4228e02dc74e8524 SHA-1: 0be6d4ce6035ba9b8550f61c1f37aacd524a9cc1 SHA-256: 742e1d4ed048dec8c46d2c792967abe008d2b9da67316ba083ab187aa2ea5ac6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://krisoc.ru/uplcv?utm_term=all+children+with+adhd+are+hyperactive
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/5a7f14880465a79bef3384e2ce8869ec/xibulugewiwepovipatoke.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6019212f9---xidepati.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6b1702e64f5c7eb1a52d953e6f2bfe1c/7332801386.pdf
    • http://bobmeetin.com/media/galleries/files/litalazejesejuba.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/512b46133a5ee51a56549a96e3b45ff8/rilaraditujodon.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2901a2fb---82471173464.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01f504eb23---51387854549.pdf
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fejidawejunigenej.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/27mbmlcc5qbj2ld0abi3gjnv0u/13559194881.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d83d3427---74075983981.pdf
    • http://fantalife.nl/userfiles/file/panadunefexerux.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/gofit.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd37a7244c---tofokejiwosox.pdf
    • http://alacarte-design.de/userfiles/file/wesegudatipibezazig.pdf
    • http://akcjonariusz.com/UserFiles/file/75700769705.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/22642024048.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/jgduq04tibtjj88hb7597661h4/77861528878.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/580827076a156c3cefbb967c481ef493/50806135426.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b5de42ad6---nozuduxudarizibelawazezuw.pdf
    • http://anhopphat.com/uploads/files/penan.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c754ee724e---salijepun.pdf
    • https://agermag.ro/mm/file/nupaborapavebagif.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/85972632724.pdf
    • 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_off0000e965.bin
160b2c0d74f54c06ae07efaa06052312ec48b5c70f1ea9080b149113bf3606a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE965 16332 bytes
font_01_sfnt_off000113b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113B4 16792 bytes
font_02_sfnt_off00012bcb.bin
001048707349b95b7510c6c1a8dda0cb3eb6c8fdfaada7f022803050a7064f7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCB 10568 bytes