Malicious PDF — malware analysis report

Static analysis result for SHA-256 616a241db0369d2f…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 06:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55cb6c1352b66bca067a0eb92e43b713 SHA-1: e41ec5f257361ea8aad008233e520b044b136d83 SHA-256: 616a241db0369d2f455d26aeb5f2757f97f5f104351b4c2d576281fbc9f98e82
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm hosted on compromised WordPress sites, with many distinct hosts and URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/septd4nfbtur8dvice1okftip3/nitanade.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01db6ea08e---83557725522.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608127657a177---16985175659.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcaf383246---99378094513.pdf
    • http://eot.mn/uploads/userfiles/files/61327249364.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e87522450b---subepi.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c58be4e4a---70554651570.pdf
    • http://turagent007.ru/userfiles/file/malevamonivobegasikinozop.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb3990dc80---ganewa.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/8dfk9utpin61sdmpki4ei4kth7/sowifigaximukororoziku.pdf
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/19636493859.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g377a5g8q5rig0vog9nckshs5i/39818104280.pdf
    • https://cape-electronics.com/media/file/gifanazewuligibukuveza.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/v5pp5fnivfung3f6plkolfq731/32318434292.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbdbc78471---bijulipolitanav.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607046b951ab0---3852145488.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b3b69ecd7---koxokudif.pdf
    • http://primaneighbors.com/userimages/tadapar.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/535a3a842e50cf641293abe3daf33abb/ruwetolabeb.pdf
    • http://adamlegal.com/userfiles/file/85965105331.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff38813beb---naxibabefutujabamowu.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe822c72ee---xaregadeduna.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/f852f9122fe6caae6ffac4a9024320ee/10122625759.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607057ac5a71c---66789521369.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ccc16c10ce2aaeefb843a898bd4fe5a2/10751816137.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=example+of+executive+summary+of+marketing+plan
    • 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_off0000ea5d.bin
90757c7250e77a62d5bba87d120f7a13d7eb9f681910a4d66916ac168b32b0d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 16408 bytes
font_01_sfnt_off00011511.bin
cb5f5d72a37a97ac6ca00c8d1aba5d5a53d81bcaaf95dcf3c6f2d763915faaf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11511 11280 bytes
font_02_sfnt_off00012f9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9E 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.