Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6ab0de8f67cd23…

MALICIOUS

PDF

72.5 KB Created: 2021-09-04 02:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: feb74b302f4a54820eb90ccb7e01a434 SHA-1: 6e27761f5e1599d3035d24963e9108419d703b2e SHA-256: 0d6ab0de8f67cd23efb359836d08636973f5cf834e49e6538bd839cf42432896
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of multiple external URIs and a raw IP address literal in the PDF structure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://dsrental.com/userData/board/file/ziridotal.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0e232b48---mebisapakunepufofu.pdf
    • http://abnicum.ru/files/file/jidupunezadegos.pdf
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/28304314192.pdf
    • http://www.bandungmesin.com/file/jefonukozadomilubo.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/4c6b7a14aad46b5d0fe36472cef3551e/32635670503.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/536269hn4b1h45j1e9bh9s18ta/fotademiv.pdf
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/71033424009.pdf
    • http://stylekd.ru/files/57670817990.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/6d4545f8f46bd9e11de8964e94bf6529/fasusadigesi.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/gogutodirukojawuv.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943e0214396---25473270577.pdf
    • http://syntra.pl/userfiles/file/74322870499.pdf
    • http://mopi.eu/ckfinder/userfiles/files/jurobo.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/983936f806ce48a466a29b99dd89281a/16929883929.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096a0cd05c7d---wameperawuravizalofivar.pdf
    • http://mtsskzy.com/userfiles/file/4621041952.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16130c43a9f97c---80023716340.pdf
    • http://project-lovcen.me/userfiles/file/sirovi.pdf
    • http://furniture83.com/upload/files/javis.pdf
    • https://vietucmould.com/img-vietuc/files/19674230731.pdf
    • http://happinessgown.com/upload/users/files/datiba.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609388cead660---zosuno.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=vogel+kimia+analisis+kuantitatif+anorganik+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b945.bin
16d26f4d59782fd7fde9d4cdae039197a1d1ee7ad9a0b943b98df9a21f8103f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB945 11000 bytes
font_01_sfnt_off0000d2a2.bin
afdca10819727d52b5685827b06e9efdc78aee9b66548963b904a8c06a8789ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A2 16172 bytes
font_02_sfnt_off0000fc65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 16792 bytes