Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba48592e4b14a0f…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 03:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39e8e9caaa65e878a5cad1413e3b90f5 SHA-1: eb4873f3ff2d525855d2bd45328fab6e5dec812e SHA-256: 7ba48592e4b14a0fe771fa76ad485de8dd40d1a8c158423da2ff51f8531a1766
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to external sites. Several of these links point to compromised WordPress uploads, suggesting a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=minecraft+for+android+java+edition+free
    • http://icltindia.in/userfiles/file/zenosegegalotuvabo.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d578ed4610a---dumifunafigikej.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/2e4bbc5f3e591b4a50080e5b9257e98d/36493398881.pdf
    • https://amadesafar.ir/basefile/amadesafarir/files/bulaxoletan.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/p2qd750li2d16i8ssmat4uu0es/73001150420.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ee6c13262---33597449830.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f543a590b6---53232172929.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/lpk3336ofpg3ingbkaf8r67sp7/21494389097.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac811bd7a27---16128863226.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07f17c8a3---56487865725.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4240eeea---wadobopewexafivinorij.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4bde9757cdacaa1a2fa2121d49f21397/tamoxavuzuximelixafepagu.pdf
    • http://shqinze.net/admin/upimg/file///69115668335.pdf
    • http://curry-box-deluxe.de/userfiles/file/27317287911.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608528b8c7162---85950046769.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/d5tk4ke8pfcjk602admo1hhutk/puketupevibovorise.pdf
    • http://shelton1961.com/clients/35589/File/vawukigexu.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/074a1c7b68219bb54c64be4e0075ab85/54231153530.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077248f75d84---ribuwipawu.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/107da8eca05ce60ece939848873ca98f/37152699984.pdf
    • http://yasairamenbar.com/uploads/files/rotodamopitimu.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c799e80a9d6---72925903987.pdf
    • https://we-plus.tw/ckfinder/userfiles/files/82134133404.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_off0000e91e.bin
81222afd48fafe2e936346c9ba23d0b077430c88bc008085a4cbecf426f819d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 17816 bytes
font_01_sfnt_off00011765.bin
03ad773533b757c459c42e761e852163675f5f81cc59868074edf2507f82033e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11765 10444 bytes
font_02_sfnt_off00012f32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F32 16792 bytes