Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea706cd99a27c978…

MALICIOUS

PDF

77.7 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: 6d62681e5a31b4541bc9f6b96b86bf4b SHA-1: c84b194ec9c138174ac9492f462287ad35c3c05d SHA-256: ea706cd99a27c978b05172b62abeb47a31d79406bb857a91efb9e72a6ca94718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a URL with a 'utm_term' parameter related to 'incoterms 2010 pdf download' indicates a lure to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://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://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_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

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