Malicious PDF — malware analysis report

Static analysis result for SHA-256 320cbae11596e1f0…

MALICIOUS

PDF

101.1 KB Created: 2021-08-09 18:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6013735326fa6d5d4103ad3c55e3c051 SHA-1: a5c4e0a284b9213e97e999c7d157eada8ac897bd SHA-256: 320cbae11596e1f0f6c4dad40185d1e4387df5633283759bbf167aa77aca5c2e
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised websites and uses a 'download button' lure, suggesting it's part of a phishing or malware distribution campaign. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soudureornementalelauziere.com/upload/editor/file/19561439919.pdf In PDF document text
    • http://riggi.ru/userfiles/file/dutugibadiju.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e58c25f2e---zekopavoliketok.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/df8f84d335803f08981d5e0a66dbb0ec/23259390820.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/livafuxizuxanelunoze.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984e08089b8---jafaxazatadosurukeb.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/a77867e68baa0bb945479dae919a012d/fotomakaligitotunulem.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/61230233025.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/senemodubiluvikola.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/72d65e28ad3a6b20a7f557c3b34d13f4/kuxuwifizu.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/164400919160fa79c149401.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/67822287203.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac16c6d499---97022489125.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/46334161802.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/tanenakakedamevadufobe.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/pickte0por49mlm1k3mq3mfhg0/fidazamup.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sutizogaxawutegivene.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/13684234938.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/jeniralarorasululibipeva.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/wunejigomefewuz.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160be82c534daa---luviligav.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bf89b29785e---48193327904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=sbcglobal.net+imap+settings+for+outlookPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 11296 bytes
SHA-256: 745239c7f38565ea5ff2b8eb2f2d6976d1ba196cdd1950569601063aacf943ed
font_01_sfnt_off000120a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A3 18072 bytes
SHA-256: d6d2d3df1a59b9088505fb11c1bdae3805a5c52f40bd3b993045f5bf579d614d
font_02_sfnt_off00013d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1D 17568 bytes
SHA-256: 99f50b9ce4e3fbbd33d88951be78c0e97151e026b31b8a486db3255405e0bb20
font_03_sfnt_off00016b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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