Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ed04107cc51233…

MALICIOUS

PDF

79.2 KB Created: 2021-09-04 21:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eab12fdb205d27207081dd896dcc59bd SHA-1: 2679769d32227062b4606724cc156acdde076b4a SHA-256: 01ed04107cc5123313a58dd9710f1b04b84d8ae6df384a18e084f770509db33e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. It also features a link farm pointing to multiple external URLs, many hosted on compromised CMS uploads, suggesting an attempt to distribute further payloads or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://smidgel.ru/uplcv?utm_term=warhammer+40k+codex+pdf+mega PDF link annotation
    • http://aweibel.com/Photo/file/98947569230.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/94280037066.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/d91be644cf2bacf0c2773386bc98a599/83692227869.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/a0e62a3bcce8b0c42e88fbc23c304681/71435029312.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/86ac545600c29061ccabfb17b8389ae1/salopuxuvekafevoz.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/gadoxudamewanowibelerer.pdfIn PDF document text
    • http://seedcambodia.org/htdocs/cljr/data/files/25153144908.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/nizanef.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/xagifolufuvutirukixur.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c717715d069da17fd8c8bc8c47c3c334/37632938019.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/donirunobaman.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/45133509257.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/38823792726.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c301d17c1b1---98775323852.pdfIn PDF document text
    • http://icr34.fr/icr/icr34.fr/www/files/files/xitopaluburux.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210831065621.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/lupimegi.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/88e2f23676ee18f0cbd0c3dbef4b3d5a/lepumegakonuza.pdfIn PDF document text
    • https://cmoretv.com/userfiles/86895626778.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/88087301692.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210905023054.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160726d71a74ea---saramokovaruja.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e31fe3de40b7f23e1fd9eb6295feca7b/4670703913.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/kofukatuvuraludubikozelad.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ee5d2b229f33718cf788140a687f4d28/pujilajijib.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/sifomus.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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 10948 bytes
SHA-256: 0adcd91e7ef151302b41156a949c2b835e5af43dcecf829cdae2cb87fea9188a
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 17180 bytes
SHA-256: 200a6b70cbcb36248cd2d3a778a5796c6c56cd8ec8b39f7a0c72a4843be06623
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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