Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01664af04354e81…

MALICIOUS

PDF

71.3 KB Created: 2021-09-06 09:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0408aad2037c91c7b44bb57f08bf1b0f SHA-1: df6d1d9043d7a59968a2ef072407f656b2a85449 SHA-256: e01664af04354e8181c210d75952b4e9b00fc3075abfb5a210be930fa36aaa79
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://laborke.ru/uplcv?utm_term=jurnal+keamanan+jaringan+komputer+pdf PDF link annotation
    • https://rlmahtani.com/userfiles/files/24819632377.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/ggh0jjvo7amhdg7ppau6c77n93/43726566473.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/xunatulupevovebej.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/53813737622.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804411d74e2---bifuzavokukipanelimefikup.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/majofulolubufanenul.pdfIn PDF document text
    • http://petrduchek.com/files/vexozug.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a8c84b67c---98112563635.pdfIn PDF document text
    • https://majubesar.org/contents/files/44771098412.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/mevowamoraxanurupepaf.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855d7d7cc1e---92050484591.pdfIn PDF document text
    • https://solturism.ro/images/file/movepatinafimajebevojil.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ff12e138dd5a278e78b04996bc467b6/60341950145.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/hh7aqbc44ct6q84nhqm2tsdkhd/dobikuxafegubovepoludod.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/51499266521.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/xuzagamokolesusoze.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/77118857689.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/78093254945.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/18199515229.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0beccf76b960b6399bebe7c08ed53ef8/89648009520.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608816a7d0591---lasefimomisubopad.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075f051c01e1---lirusubizusib.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/28484676048.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/135df48e05d15b55c662e7731bef2b7a/jijogosazezona.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_off0000b604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1B 10984 bytes
SHA-256: 2f5f0dadfaf45c7e733ac45297cfe4c7bfeb49f71a415a702f9d444e717011f5
font_02_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 15824 bytes
SHA-256: 06af7b1e8cda621fcac09a0d7f2a171d7d01a453a718651135359d515400457e

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