Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2dbbaa2cbd4be8…

MALICIOUS

PDF

75.9 KB Created: 2021-09-20 00:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0fa3d46e98a371885fc861c3573de664 SHA-1: 3b1542cdc203ef86bbb6d9da6366965e554bc58e SHA-256: 9f2dbbaa2cbd4be86e7fbca878b6809a380f83b9ff2158b22316d1067bba6c38
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, with one pointing to a raw IP address, indicating a potential phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests this document is part of a scheme to host many links on disposable domains. While no scripts were directly extracted, the presence of embedded PDF objects and the overall structure point towards a malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cdn.eagle.mn/uploads/userfiles/files/supikove.pdf In PDF document text
    • https://keluargamimpi2.com/contents/files/18367319666.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/nupitagiwalerilogoninad.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/14879164425.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/pibebeletobusivupiwe.pdfIn PDF document text
    • https://network-italia.it/file/96171774078.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/bopilod.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/11390315370.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/dovodolaletefomajob.pdfIn PDF document text
    • http://zima.italie-ubytovani.cz/data/file/zitubeda.pdfIn PDF document text
    • http://gaudi.tw/upload/files/55042841932.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/97181188881.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/62596354114.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/23971938792.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/pekexa.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/4420987964.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/45394780229.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/rabuposobet.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/musovabulaguseso.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/leterowenolufesulibovaxu.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e43415b328---70760941371.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/80776361692.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/48334081193.pdfPDF link annotation
    • http://cgpreceptor.com/ckfinder/userfiles/files/91659480214.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/39663399245.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/gajafofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=reface+pro+apk+free+download+for+androidPDF 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_off0000c579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC579 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 10572 bytes
SHA-256: c9bb71490445b5e772ca8335ece023dee7dce4d681b62b0d951a391c68cb9494
font_02_sfnt_off0000f5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C8 17080 bytes
SHA-256: e87e99522270494d90fcd3c53e5b60670748b9975a6ededeeebbceb873df39fa