Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc29b46c6a7a345…

MALICIOUS

PDF

77.9 KB Created: 2021-09-06 01:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5b139542842fe453bad7f5895c8d5761 SHA-1: b1606ad834db0f3c2007244e8c86703e80abfd6e SHA-256: 1fc29b46c6a7a345ac6a57fa716521f4fd8bfe4c2d7d291c05adc2cb50f257a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs, many hosted on compromised or disposable domains, indicating a likely attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of external URIs and link farms points towards a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://naviway.su/upload/files/dazaritizuvotavelo.pdf In PDF document text
    • https://marblobaths.ph/app/webroot/img/files/15253233526.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f465d30daf---64013370740.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/piwibu.pdfIn PDF document text
    • http://futboltotal.net/images/files/neguletu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4pabpuj3g5c3crs4j815sn4u62/70767322155.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/45024937207.pdfIn PDF document text
    • http://wenxuezj.com/images/File/bojebodivid.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/fqqn6pgd2n7lsft9ks8r9el410/54883118063.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b3c570a629093e4a72d498e262bf3320/vonolokugulavojewuv.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/sanuvuwazurula.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/54603981690.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/650d968dfb3c4deb0dc03548d7759177/83729261584.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16120514ce222a---59887565046.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/41940995813.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/rpmbdf01745dsa3fukco747ga1/13733244823.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/vujapokidotekotaloki.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210823220225.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/xemasijopesimes.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/goxotudov.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/tasodivotov.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/kuguwamededanupoterel.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b884d29085f---najawetotetomutujo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=free+download+pdf+to+word+converter+filehippoPDF link annotation
    • 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_off0000cc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 10680 bytes
SHA-256: 0dca068f9f6a8213ad831eb9d52b03d3803d8b3bdcab7964e7415340499e40fb
font_02_sfnt_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 17304 bytes
SHA-256: 8066dada386cbb7f8bf57e6ea70b648cd743dd640b6ffc1e4829f58b6bbc1872