Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc5e9303b7cd1a5…

MALICIOUS

PDF

81.1 KB Created: 2021-09-17 02:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 509a03967acd5528b4d576302f66d599 SHA-1: 9e182d9adc08103588b73267a210ceb6818af261 SHA-256: 7dc5e9303b7cd1a52723aad5ae0c381a932703a8e696d1b9fd434757e96af720
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://archism.ru/uplcv?utm_term=ppsspp+ps4+controller+android PDF link annotation
    • http://smartraoptics.com/fck_filemanager_upload/file/97655296408.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/verunawiponaw.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/c023b698c4a84408d879f4dd72aafa6b/72592899061.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613760c7e7362---23214541883.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/24177496907.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/49989364615.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/rubalodewugotokelepipoz.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/2906575820.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/72451930772.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79527212168.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/kejewimokaladatoxomebi.pdfIn PDF document text
    • http://kelsenator.com/userimages/9033917950.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rpinf7irsl32si43simk268pef/vijudazesemavosoteju.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/32678585267.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/betub.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109082125518996.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/burexuzoluzeparidunu.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/wexidupuxeg.pdfIn PDF document text
    • http://tattooindex.nl/images/uploads/14706308531.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/modeturixevudokosizek.pdfIn PDF document text
    • https://hse.tw/upload/file/mekirudoxisovekaw.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/aabbf0d45d0639b0d51fb0d6f24a0461/farafelusi.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/boxatiwokepijolunopuradol.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_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 17740 bytes
SHA-256: 654b691572f3e29d1ed282c137f86ca593f6639020df56df3a397a8d9bf64e82
font_02_sfnt_off00011eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEB 10588 bytes
SHA-256: 1f21e85abbd985f12409d1e707460b1c30a5b821642b6c1992f1bef7b266a615

Open this report in the interactive analyzer, or submit your own file for analysis.