Malicious PDF — malware analysis report

Static analysis result for SHA-256 081c81ea12d9ac6d…

MALICIOUS

PDF

78.0 KB Created: 2021-06-08 10:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c8dc4f4984c527f76b3f48af9de7b7b8 SHA-1: 021955764905072d98e59608d1b85ffacdb5a509 SHA-256: 081c81ea12d9ac6d14fb686cb40ea57bf331d260be9bab066e9f12072ae26b8d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating an attempt to host malicious content or redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to phone unlocking, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://wastran.ru/uplcv?utm_term=how+to+unlock+alcatel+phone+with+google+account PDF link annotation
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/4f36c9a7e6e9a5064211c7ce1f304cad/7920614969.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d544935a15---rovubetimuloj.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/2vrd3j0360ta2p8fco05362n0t/32037014241.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/9da08c9c282a277cff55cd8b9f71b876/56569457928.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/bd8561ebe837a1b592d06b9e47df9762/nufetizasesupugivolu.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/zorekaxitawefugokulux.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2824a2a1---86574356870.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/gaop0gd7ok8hk1uds45ltfiv42/60017280698.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9aef5b63f---78482665317.pdfIn PDF document text
    • http://abpaluso.com/upload/file/jedetejukek.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/89189329041.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/46363989925.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f7227d63d90da93a93f3bc64648cc9d1/ganedazutudofawevutukel.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/pekizedorevikoridirinata.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e188738e6f---sobagoxuwuradugipafibi.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/gukamelemevepijiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 4920 bytes
SHA-256: 88013e93c95ced3b0b217fe3bbba24f56eaa7508c4c8abc58e92aee382141528
font_01_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 10728 bytes
SHA-256: 2e5f55418f1a0a91ea187c20369a6eb0da8e4a48b4d17bd235a5db9ebf2c7203
font_02_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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