Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3faf810e1e0438…

MALICIOUS

PDF

80.4 KB Created: 2021-06-26 09:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6339fa50a3cd60a6a32be9feef2db5db SHA-1: 8c1dfde9b38d3bdb5296dcafe61de4a989f1cf9f SHA-256: ae3faf810e1e04383afec8116df9ffa7dd756ad7724cbf77eb4d335b23e36788
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features numerous links pointing to compromised WordPress sites, suggesting an attempt to host or distribute malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec6aff278a---83043831974.pdf
    • https://eyetracking.pl/userfiles/file/sewabosenigixobajijo.pdf
    • http://blevy.com/ckfinder/userfiles/files/65130615453.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fmdduru38ao2vofrhb8ga04ro5/jolajuv.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797014b2fc0---soramerekuvutuxox.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/da093d2f4a9951e7d76da430b921c4de/pijowo.pdf
    • http://www.naraihillgolf.com/admin/userfiles/file/najulosegumud.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16077510b03f1f---61861464493.pdf
    • http://capital96.com/userfiles/file/vigetapapilejuxawexepufo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4077485c58---55171798063.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/kjb8j3kfjcivak5jp0lf8o9fgm/zeponali.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/g2mv36h7br12guebrmrvr7a3us/95256847508.pdf
    • http://eltonltd.ru/sites/default/files/uploads/17292557017.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/df3db22d2ebd13a4d20022552f564df5/82096900173.pdf
    • http://dagmar-e.de/userfiles/file/popagumonizibipamivewe.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b232936db3d713dd9f097d368152d721/texinamefoneratimojemo.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ddff974d1---18173996402.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/09322220eb011f91e09a738dafd44d6c/44070378080.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa713bcbe9---geraxadabanud.pdf
    • http://www.jacenter.org/js/ckfinder/userfiles/files/letonesagana.pdf
    • http://geoass.eu/userfiles/files/vimokevapepupatemavibire.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081c628a1ff3---pinomopozuwejaxo.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/68d884d7f0d35830def0b9a2eefa6dab/tagawevodekowosa.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be74ba01831---reboperudumidavixuton.pdf
    • http://edanieltour.com/FileData/ckfinder/files/20210608_7544CD7ECD88D2C7.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=concept+and+philosophy+of+inclusive+education
    • 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_off0000d632.bin
3ed11fa349e2fe653b78651098afc4f67035fe51359319daad48420a25b3642e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 17104 bytes
font_01_sfnt_off000102cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 16792 bytes
font_02_sfnt_off00011ae6.bin
a5399927b2ce34fa5c529cb531f4348fad52ec1c3a19339c8831952d20217836
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE6 10928 bytes