Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e08d838d8918c8…

MALICIOUS

PDF

86.4 KB Created: 2021-07-06 14:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74dc97cd3cef1fee954969b42bafc342 SHA-1: 5ebed2578084ba9b3155148d0a272503f87145af SHA-256: 84e08d838d8918c81b11cfade094b099552155d57152db0c6629d39ec37d37cc
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://addsfly.com/userfiles/file/popodopitumiporujopadog.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160988ba350d93---jidemasesis.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/39926629370.pdf
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/65526158134.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0744e6a3c---puvabas.pdf
    • http://gillsandgeckos.com/userfiles/file/65248708203.pdf
    • http://centrons.com/uploaded/file/120992010960ce1d4b01136.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/9c16bc7b9595910c72c27913fa9c058f/5648955289.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a22ff2c68a7---62496985791.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e28a61494---xojugap.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a26004c11e8---70611037373.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d2f17ff93.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089321f99fbf---puvoresonegijefogigo.pdf
    • http://curry-box-deluxe.de/userfiles/file/nasebogewebuzakopalopigo.pdf
    • https://mps-india.com/userfiles/files/79828671208.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906b9649894---6867034708.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a53e338e8---50629021165.pdf
    • https://jakspravnenapsa.cz/userfiles/file/vudenilalafe.pdf
    • http://austintownfitch1980.com/clients/879833/File/5587041092.pdf
    • https://tonitomov.com/picture/file/golujagifojox.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31a9b8178d---73447575000.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/f082c481eed6f9237785f9fcf1abd2cd/dozenupilale.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d90d55f4b196d3bcbfe71ca963d971f/peludomiwileruruwiputu.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8f6c07ab8ea206dd3841f34582b06a64/bamalekiwuwojobewimanabi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=just+j%27s+yacht
    • 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_off0000efc3.bin
443f295abb341d452660e1cccd0983b401ebaf9db4f7bd019b9994eafdbed7ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 10104 bytes
font_01_sfnt_off00010689.bin
cedcf4570f6dc9538fa922fccf636eade8be50a9dc664698b9b998a7593c33cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 17604 bytes
font_02_sfnt_off0001346e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1346E 16792 bytes