Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef505ffa9bca5ec…

MALICIOUS

PDF

82.5 KB Created: 2021-08-15 13:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 49fe18e12963424227b6bc52bc415249 SHA-1: 37ac800ea9ffe9799b3bb9cd76ec4831be7e0c68 SHA-256: 1ef505ffa9bca5ec17dd67614d2002d42c76dad9e2a644131f5e10450d75f8d1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous URLs hosted on compromised CMS platforms suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c246d4832f4---62450884457.pdf In PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d0e796f40acef99f514c0730c83cab84/rerojomajobafoma.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ab0cf144a8f72a08dd3d85fbce78b8e/mozume.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/51ad64bee86ed611b9bb1e82ea43a7b1/11733153946.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/wuworubawonu.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/xupoxuk.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/48f21e2e0173c0f697783a812994b30f/65273513664.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5902c6b9e---vonawesikajifij.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/juximamufabozuxuzeje.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb2ed2d1e---89047618152.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e60b7a8a79---tutefinamidigixudekufari.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/93631778043.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/vuppu98mf4aoua8n0do7a9bpi5/18162386467.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ph43m6bm48qd0tb2dai02ue97b/23818878712.pdfIn PDF document text
    • https://greenways.at/userfiles/file/13079699771.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/78570071835.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0ojgblgr7qd140ao57sctn9rdr/59664968928.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/af93b7b7039621c7716bbd50f7b40f7e/77429879329.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/91378137606.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/55680485721.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/wetaxojo.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/bc770c971eef3801ac0c4328d79eeb27/milabo.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/nodutefanogitana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=adobe+photoshop+cs6+portable+free+download+filehippo+32+bitPDF 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_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 11384 bytes
SHA-256: 2cdce947dc4bc72feeeb3e59011a72efc59f56dea05924a33326eec5928914b4
font_01_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 17580 bytes
SHA-256: 2becb6d2f552554da6455aa171475e6be3abe66349905d7dd30f79ad8b283199
font_02_sfnt_off00012131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12131 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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