Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac4e0fe6e455db8…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 09:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eadde0a5937f63183118cc05e0652b32 SHA-1: 32eea76252914276944191666080a34eb354b872 SHA-256: 6ac4e0fe6e455db8f2add107b8110f253d8ddecc34a77a1a012fc72c185f66c8
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites and disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for initiating the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://logiccpacma.com/ckfinder/userfiles/files/12334203776.pdf
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fejerixubexijuxiked.pdf
    • http://odpadykj.cz/UserFiles/File/1203754546.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eded51417f---46594371772.pdf
    • http://asckhn.com/acskhn/userfiles/file/begutovitunibaxadug.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160831e768ad31---xewukeza.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/3rg1591vmlte9e8h28devhmrk6/53243381005.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a516ec333---tujijusikurexasakasevoji.pdf
    • https://alakharia.com/public_html/userfiles/file/minesuviwusawu.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/95d6fd20d1f7fda200c48dae63deb6ae/272745609.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/vb6pectsehqol2qa3achp0m0n1/75039270888.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vekitomeketoluweton.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/08a72ab53893b16273244d8f56a556af/90587920103.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/264eb8558d6af983fdae46e6fe8e8e75/dotuxetatajokido.pdf
    • http://thamdinhgiadaiquang.com/img/files/8460008117.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dcd503e83---zopuvemejufubotavabika.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f85ec58a---33987347841.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/vidomofimidamede.pdf
    • https://adepotcustom.com/UploadFiles/file/20210601044307117.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cab9cbf641---sowefedaxilegitekaxumazik.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/8479594372.pdf
    • https://reaga.net/js/ckfinder/userfiles/files/lafolesogawugelasezi.pdf
    • http://mid-europe-ex.com/vetupijafetixasuvigoduk.pdf
    • http://meble-tk.pl/userfiles/file/57808923204.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/e281b4fc4eff03e607aeae0db5149ff0/14817059994.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=page+break+preview
    • 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_off0000eb45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 16792 bytes
font_01_sfnt_off00010357.bin
5d07b6c7de3d4d725eabee553f7a5e1e09311f70ffe8115dbe0ebb38d8601e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 16892 bytes
font_02_sfnt_off00012fa1.bin
58b54b6f4a583b8f0377a6c6c434da401818a72659c398ac36d4174a3f70df86
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA1 10276 bytes