Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adc14420f957bd5…

MALICIOUS

PDF

87.7 KB Created: 2021-07-05 15:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cfcdc96feda4426dd4e93e977b420f7c SHA-1: 82cb1a28dbdb20ccad4e6da202872312d6b19988 SHA-256: 2adc14420f957bd5c4386802b870cf29952fce530936e9c4b221de9001667c76
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristics indicate that the PDF acts as a link farm, pointing to multiple compromised websites and disposable hosting, likely to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://apcmagon.com/userfiles/mixavan.pdf In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/v6im5b6d83m5pmmmo69re1fsk4/11848157027.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8f31dda8a---bafizewusujiwu.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec6e21f229---35901155985.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/11872223747.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8l32753hb2t6573c57sc8d1c1r/71045182656.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/485c6536ae74b67658c8775617145cd0/niwokiwaf.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202106/1623434340.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/guriturodinugukotikuv.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/tosirupilubavefoxiw.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/sitowowovepogo.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/ruxifopefa.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/58963223499.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/jogiwuponedisigoke.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/91360118533.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/09d003d4431f8fc41ec30c6d38f5560f/30484980269.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/50712433932.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c2ee64f7e---35704259757.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebaf80d70a---88781770237.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d5f96d133---wojapagofanoxularubofo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9c5ddd988---52805034890.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/dilawupikanurotawawa.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8675a87c67---katokovoje.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/37cffda4115c25735de56f79d4318b4f/moxugidejixap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=left+abdominal+pain+and+back+painPDF link annotation
    • https://medlineplus.gov/abdominalpain.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 10700 bytes
SHA-256: 9079ce479c70267813de1125346b0f46b51a293366a4ba7efc3929e6e3495b2a
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 16184 bytes
SHA-256: 4ddba3967ac042a390d6c0f2bc61c7903d48a4cca37f0c6b5ff49bec2e08f4b1

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