Malicious PDF — malware analysis report

Static analysis result for SHA-256 17aea9d575000f54…

MALICIOUS

PDF

87.9 KB Created: 2021-08-17 13:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf2f114ab27c9fdac7a7ee07948aa891 SHA-1: 8fce2d40fd0306bd20bcdef2e1f3ad5694631de4 SHA-256: 17aea9d575000f54d2e2582e2888bfc50ef96a5bb3360b65b0bccb422de131e0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the presence of link farms and compromised CMS uploads, suggesting an attempt to host or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://kag.fr/userfiles/file/90568631633.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16107beed23a27---jeniwegixidusip.pdf
    • https://btegypt.comfile/sinugo.pdf
    • https://chupwo.com/editor_upload/file/85649520621.pdf
    • http://kleinschaden.expert/userfiles/file/zojerijorabisorijen.pdf
    • http://cerescommoditiesltd.com/Images_upload/files/79966868323.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/afbc2218fb2e0db2d43852fbd98bdb64/fodasibasufokefig.pdf
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/dizeparozala.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610789eed6b48---30707189698.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/dibukojexatuna.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/dc69f1d02421444b17c6b1512bb14315/12556243781.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609862dcdde71---27231525150.pdf
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/57805002613.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16117018e037d3---6885451403.pdf
    • https://tootooair.com/FileData/ckfinder/files/20210610_537B21D9372937F6.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607598700b006---59219946064.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/372849535ad939a7949fae0a17f1d9b7/jugeru.pdf
    • https://erdemlerkoleji.com/resimler/files/64796187287.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8605eaecafda54e1b6fc81d76e801fc5/45134345822.pdf
    • https://accuratesearch.com/userfiles/file/vudumomeporozoxagukuwe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=manual+de+identidad+corporativa+saba+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_off0000eb5b.bin
eba703f475a674b4abc3844a0db64182abca0ee798b5ebacff1760eb401e84dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 19596 bytes
font_01_sfnt_off00011e38.bin
7dc489838a8b6da989effe4f4597305e0944200b32533e55e5908f6cfc4b431e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 10912 bytes
font_02_sfnt_off0001375e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1375E 16792 bytes