Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a2815b480ee233…

MALICIOUS

PDF

74.8 KB Created: 2021-09-05 12:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 200057a6402bebdb848c11a6563763b0 SHA-1: 7051a4d0efe852ccc607fb719bb089976dbb7405 SHA-256: c9a2815b480ee23304cae60a94a0f1c5268bf477c3783c30db5ce93834faa1dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple URLs pointing to compromised WordPress sites, suggesting it is part of a phishing campaign to trick users into downloading malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6526

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=incoterms+2010+pdf+ti%E1%BA%BFng+vi%E1%BB%87t+download PDF link annotation
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612e752244b4d---tofulusuvepolepegip.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4424ef1a3b---zogibaliguvew.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/kanuwiwukemobaso.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/zufufidunogewejijove.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16073f72082b66---zojasufatowupetev.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/nogadavalabetujeximekixoj.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607262a274fe8---26713643866.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a35f3a94317---xotezopuletove.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e03fae3e3---21797248461.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/badifajimepebovakejup.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/jajugamexagajorun.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29804569603.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094987c439ae---48657100892.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/ripevakelararavil.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1ef3e31228e123e16e1bfe724b7aa50e/99337995039.pdfIn PDF document text
    • http://stevis.cz/files/file/50989641411.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/2c0171356734b86fdb13f459767778c5/rigonibomitine.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/2236829883.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/magozeletarojir.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/96225128025.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c33c338e7---tizuf.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/56970168056.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/52439416225.pdfIn PDF document text
    • https://mfdesign.hu/files/file/mirogupixikulidefa.pdfIn 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_off0000c66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 11744 bytes
SHA-256: db4f8cbe4ba0c58175a1b7e1993087b5befb82a206a9c8ff18ac692f91fe791e
font_02_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 17348 bytes
SHA-256: 642e2b9f47dfcc0f0960191271ada9c605cc92c03784a5e40560c7d5c88d773a