Malicious PDF — malware analysis report

Static analysis result for SHA-256 1120eda1952668c4…

MALICIOUS

PDF

81.3 KB Created: 2021-09-18 07:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25bc4d4b11a207f404fc45b67d24d280 SHA-1: 9a187c912e3386b0796fc93b6e60c611e487bac9 SHA-256: 1120eda1952668c4aaceea42df0d9149429ec150251b5bec4c827e72e5668353
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://allytemp.ru/uplcv?utm_term=bigil+full+movie+download+filmywap PDF link annotation
    • https://suthuytinh.com/app/webroot/uploads/files/28019393351.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614017769ad2f---dixabebonufu.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/11158578386.pdfIn PDF document text
    • https://digireg.at/upload/90500389004.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/37775743847.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/163140901215304847343.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/biduvegatumofijenus.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/pukamulepe.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210917_CCBADC44FBCB8D27.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/zonojisom.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/83356393519.pdfIn PDF document text
    • http://abnicum.ru/files/file/wanutizewelozuvutatifi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161376f19946e0---15053953369.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161300eb169b49---61107486760.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/55395035292.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/kepevinajafom.pdfIn PDF document text
    • https://glozor.com/userfiles/file/51568325202.pdfIn PDF document text
    • http://vinamex.info/uploads/news_file/jexakokiraju.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210904040115.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109150611386698.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f8067a525---xitexorez.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/tonugokivemosumevi.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/vuditusaxuboriw.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/3022811139.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_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 10896 bytes
SHA-256: f7a609cdf6a1a85462ee5c783553e607c0c1feceb2f61914f41c50294005c07b
font_01_sfnt_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD7 17224 bytes
SHA-256: 9ebcf6c15f215af4952eb45fedc41cd609ce30dcde82bfaaacdf73ca2c706698