Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd7f149a014785e…

MALICIOUS

PDF

84.8 KB Created: 2021-07-02 00:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fa9ee1dcf4d3ffb16f1d4c0df6ab8fd SHA-1: 5686dbd61c2742cefc729523ece9e5d84a6b4864 SHA-256: edd7f149a014785e9a980d51cbd4b41e60cfd53edf7b998cff3b28acb8fd1df6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, suggesting it is used to distribute further malicious content or phish users. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa7f256752---durafojisepinunuresigipip.pdf
    • https://copab.tn/216mag.svn/uploads/files/pefumebomudelip.pdf
    • http://dioceseofniranam.org/userfiles/file/gifobizibawovisi.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/7c03cb17214420c0dd963e74471e79ed/jonikotexizozesu.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/703689031d5b32244e78b3168170ce27/39657522890.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/93574b7eaf55b4b3f13e4de0394b2818/47404960846.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8857297a---virewefobuxobozo.pdf
    • https://alianzatours.com/imagenes/file/48928528259.pdf
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/tokuniromilukot.pdf
    • http://myxroad.com/upload/userfiles/file///43764086242.pdf
    • https://carsen.sk/editor_uploads/system/files/dufisab.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/2qhvtjebimfgfcpu1d5sn4vrs2/tigezubunibedubixe.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809d2bb46b8---zonopebunidetulawewini.pdf
    • https://allcreaturesinc.com/files/files/jidaramoje.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607879215d889---74696954892.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb7fd5324---roxemapef.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878b3ef250a---11342708837.pdf
    • https://aucordechasse.fr/vosImages/58597280150.pdf
    • http://cerescommoditiesltd.com/Images_upload/files/sikexu.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/6b9885fa1e6920b9e2b5c04c29c033c8/81898171356.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/sewijelasopozoz.pdf
    • http://greece-ex.com/images/blog//file/36860658394.pdf
    • http://fxmeat.com/upload/file/d4cb5ac8d5265b0c3703b47c433161c5.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=types+of+muscular+strength+exercises
    • 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_off0000e880.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 16792 bytes
font_01_sfnt_off00010097.bin
b0013af396fa9f34729068972d35c8166c6df1d60e3d3de508acd205a2294cb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 11204 bytes
font_02_sfnt_off00011ab3.bin
68bbc45107e5284b6c62d83d1aafcd93d7ae1ed6f73acff4cdbcf80962d4b3c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB3 16588 bytes