Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcca96daa36a020b…

MALICIOUS

PDF

87.4 KB Created: 2021-06-27 20:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f7e6d9f1aafe88541539d0b51264f05 SHA-1: 30bc1a9c307c956423dce82808d42366e13837b9 SHA-256: bcca96daa36a020bbb7a402cc83094d78e5492bcd432a6c9ef700fc12ec3621b
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to obscure the final destination. The PDF's structure and embedded URLs indicate it is designed to lure users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/144f5cdc09b5cda808fd575fc01f6cc1/xiwowomuworegakajiwo.pdf
    • http://deauville.ru/files/file/3533005198.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e15b387ab9---87738196674.pdf
    • http://interel-rus.ru/test/sites/default/files/file/52227731141.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0578102aa---nidegozapunadojezixobos.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/isprlfnkpi5e3lb6qt8s3dafvp/kolasefo.pdf
    • http://brilliantsolarpaneling.com/userfiles/file/4936598106.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7008b45d93b1fb03df0775dd3341d920/vewawipemaxikokimeruduju.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873d3808190---6656658986.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/97187182413.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ac0325fe792ad6755b1089f5992ef189/nitejovubuto.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca450a1ff9---xozopifabeja.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d87d38b71e---mobep.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97b29f0f08---57598583202.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608890b26db37---wofotizowitidofem.pdf
    • http://villalapinetafavignana.it/userfiles/files/dejurawedazex.pdf
    • http://asfalon.com/__files/file/gubigewujumosolujo.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be83135ced8---16879170864.pdf
    • http://altelaw.com/uploads/image/file/40210749058.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b36bf87b0a---sexufuve.pdf
    • https://gruppopolidori.com/upload/image/file/kowosiposupovalobite.pdf
    • http://lubrifianti-auto.ro/files/file/96685598862.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2813cd2cf4d782148ebd7aeefd942631/vepumigeg.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/de7ec4bdbc77cc2ae07d49ce3c26877f/9098552180.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=nationalism+in+india+class+10+questions+and+answers+pdf+download
    • 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_off0000f061.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 16792 bytes
font_01_sfnt_off00010873.bin
2bca13b45303cfd3452f3c3615d78cfa8cd5a129d64d731100765228ee6d4d18
pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 16616 bytes
font_02_sfnt_off00013378.bin
0dcc668253a759cd5a0cae0a68509f2367ec48ca5c68e7069f1dba2482313bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13378 11264 bytes