Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac0718fc660d144…

MALICIOUS

PDF

80.0 KB Created: 2021-07-14 02:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7f9ca91a08b95a8bb71cdd3b723f461e SHA-1: db547e1402c9fcb33faa69f2127b29f3f445668f SHA-256: cac0718fc660d144398cbfa02a60ed8219503e25c9b3cf9dc16d4124bf48aa3f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan delivery intent. The embedded JavaScript likely facilitates the redirection or download of a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=norcold+n841+manual PDF link annotation
    • https://geneticapanama.com/userfiles/file/gemekulufalovevati.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/dimelujuwom.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086044919cc1---rawosatafomufakeb.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ivl3sfb5cag32o70juhveq3u44/berufi.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fa2d37f7---60374300360.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97702d2eef---pevupuwosowejojawepokumew.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/koxikibofigerapezilerig.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/potojavav.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080c8c08b502---pesewoxomujunez.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/o7gn5rih77fp20a1nr9hmbnbb6/nisidifikizazazolufo.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/49847480749.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb541a8570c---godekub.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd7f3033e7---37947188077.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/vilagadozoras.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/5fd9e98d78f6dd0ec5d92e32351c7a3a/narevexi.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/95839879190.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/javinajiwapilul.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/vimafodirezodimujuvutuliw.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/gefopazoruw.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac42f5151b3---6363179845.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/soruperufitojuxomore.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/7961f59d584409afe8247503ce22b777/90294624577.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072c1bb15e93---12748364836.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/e9c0d1918b5eec9cccf5067e50019886/balujevusaxekilavemod.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8209a567f---vijebubuvovo.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/68657880061.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/a49a3b05d7c95841321eb64c619e9fb9/21159396031.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 10456 bytes
SHA-256: cd704faefb8253f91d073d2867035f09634b2695866c834a81f4204e8e4f61e9

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