Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25fc9cafc0d1a54…

MALICIOUS

PDF

79.6 KB Created: 2021-06-25 12:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccd8e23cff43937d39f01c4106974817 SHA-1: fc5f1b53cea2c2bd621b64f32b44d0c4b9a3e528 SHA-256: d25fc9cafc0d1a540e61f8014e3c1e168c3f0c8b36d75fad73889ddc358eb45b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs suggest an attempt to manipulate search engine results or track clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b586b3edafd---ramapemoraxi.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c09a4941---tusarokeg.pdf
    • http://dchs1961.com/clients/871949/File/bulexulegak.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ce3b607e90b852af5888ee72e3ed1d7c/gibabiti.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/4cc24aad52204ae2ff8fde188efcf7b0/79363106823.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/jt5of10rusc46a39u2d0he6ara/89958978569.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607f787a9952f---tosazarivatapusedo.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/1c55a35oafks3ba2f5abia7b3v/11816998524.pdf
    • http://uleshuzatshop.hu/files/file/37945764584.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5c7480801308077e7960fef0b473c230/gasomagipuju.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a94272b8054---31794162196.pdf
    • http://www.contectrade.hu/fckfiles/file/dajomorapamorapupeke.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e83d3cf00877488fc4a00ddd221fa2f1/14328124852.pdf
    • http://roocenter.ru/upload/file/30147464540.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/994d729f152afe4b7e5510c3889da4d3/45593107048.pdf
    • http://pogservice.ru/userfiles/file/34657880064.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=stihl+056+manual+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_off0000d3fc.bin
9f81455d01d2a88a0d60989934de422ad045863799d96bf22bcd80974b9d92b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 10840 bytes
font_01_sfnt_off0000ecce.bin
b6d4018bd4721391b3168abb109fc1007d45ebcf2ffd8289affab8f4ee681640		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 17224 bytes
font_02_sfnt_off000119cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 16792 bytes

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